diff --git a/apps/workflowengine/src/components/Check.vue b/apps/workflowengine/src/components/Check.vue
index 5f8140f222..8583288016 100644
--- a/apps/workflowengine/src/components/Check.vue
+++ b/apps/workflowengine/src/components/Check.vue
@@ -89,11 +89,12 @@ export default {
 		width: 100%;
 		padding-right: 20px;
 		& > *:not(.icon-delete) {
-			width: 200px;
+			width: 180px;
 		}
 		& > .multiselect,
 		& > input[type=text] {
 			margin-right: 5px;
+			margin-bottom: 5px;
 		}
 	}
 	input[type=text] {
diff --git a/apps/workflowengine/src/components/Event.vue b/apps/workflowengine/src/components/Event.vue
index 2621b8ca3b..5ff59882b9 100644
--- a/apps/workflowengine/src/components/Event.vue
+++ b/apps/workflowengine/src/components/Event.vue
@@ -1,6 +1,6 @@
 <template>
 	<div>
-		<div v-if="operation.isComplex && operation.fixedEntity !== ''">
+		<div v-if="operation.isComplex && operation.fixedEntity !== ''" class="isComplex">
 			<img class="option__icon" :src="entity.icon">
 			<span class="option__title option__title_single">{{ operation.triggerHint }}</span>
 		</div>
@@ -60,7 +60,19 @@ export default {
 }
 </script>
 
-<style scoped>
+<style scoped lang="scss">
+	.isComplex {
+		img {
+			vertical-align: top;
+			padding-top: 4px;
+			padding-bottom: 4px;
+			padding-left: 4px;
+		}
+		span {
+			padding-top: 2px;
+			display: inline-block;
+		}
+	}
 	.multiselect::v-deep .multiselect__single {
 		display: flex;
 	}
diff --git a/apps/workflowengine/src/components/Operation.vue b/apps/workflowengine/src/components/Operation.vue
index 1ee7a2e4c9..346b28e6b9 100644
--- a/apps/workflowengine/src/components/Operation.vue
+++ b/apps/workflowengine/src/components/Operation.vue
@@ -59,6 +59,7 @@ export default {
 	}
 
 	.colored {
+		background-color: var(--color-primary-element);
 		* {
 			color: var(--color-primary-text)
 		}
diff --git a/apps/workflowengine/src/components/Rule.vue b/apps/workflowengine/src/components/Rule.vue
index 6a8757c5b3..f1551d985c 100644
--- a/apps/workflowengine/src/components/Rule.vue
+++ b/apps/workflowengine/src/components/Rule.vue
@@ -1,7 +1,7 @@
 <template>
 	<div class="section rule" :style="{ borderLeftColor: operation.color }">
 		<!-- TODO: icon-confirm -->
-		<div class="trigger icon-confirm">
+		<div class="trigger">
 			<p>
 				<span>{{ t('workflowengine', 'When') }}</span>
 				<Event :rule="rule" @update="updateRule" />
@@ -12,10 +12,11 @@
 			</p>
 			<p>
 				<span />
-				<di<input v-if="lastCheckComplete" type="button" class="check--add"
+				<input v-if="lastCheckComplete" type="button" class="check--add"
 					value="Add a new filter" @click="rule.checks.push({class: null, operator: null, value: null})">
 			</p>
 		</div>
+		<div class="flow-icon icon-confirm"></div>
 		<div class="action">
 			<div class="buttons">
 				<Actions>
@@ -26,15 +27,15 @@
 						Remove rule
 					</ActionButton>
 				</Actions>
-				<button v-tooltip="ruleStatus.tooltip" class="status-button icon" :class="ruleStatus.class"
-					@click="saveRule">
-					{{ ruleStatus.title }}
-				</button>
 			</div>
 			<Operation :operation="operation" :colored="false">
 				<component :is="operation.options" v-if="operation.options" v-model="rule.operation"
 					@input="updateOperation" />
 			</Operation>
+			<button v-tooltip="ruleStatus.tooltip" class="status-button icon" :class="ruleStatus.class"
+					@click="saveRule">
+				{{ ruleStatus.title }}
+			</button>
 		</div>
 	</div>
 </template>
@@ -152,6 +153,8 @@ export default {
 
 	.status-button {
 		transition: 0.5s ease all;
+		display: block;
+		margin: auto;
 	}
 	.status-button.primary {
 		padding-left: 32px;
@@ -166,15 +169,19 @@ export default {
 		border: none;
 	}
 
+	.flow-icon {
+		width: 44px;
+	}
+
 	.rule {
 		display: flex;
 		flex-wrap: wrap;
-		border-left: 5px solid #fff;
+		border-left: 5px solid var(--color-primary-element);
 
 		.trigger, .action {
 			flex-grow: 1;
 			min-height: 100px;
-			max-width: 900px;
+			max-width: 700px;
 		}
 		.action {
 			max-width: 400px;
@@ -214,10 +221,24 @@ export default {
 		background-color: transparent;
 		padding-left: 6px;
 		margin: 0;
-		width: 200px;
+		width: 180px;
 		border-radius: var(--border-radius);
 		font-weight: normal;
 		text-align: left;
 		font-size: 1em;
 	}
+
+	@media (max-width:1400px) {
+		.rule {
+			&, .trigger, .action {
+				width: 100%;
+				max-width: 100%;
+			}
+			.flow-icon {
+				display: none;
+			}
+		}
+	}
+
+
 </style>
diff --git a/apps/workflowengine/src/components/Values/SizeValue.vue b/apps/workflowengine/src/components/Values/SizeValue.vue
index 03b28f1894..3e59b70453 100644
--- a/apps/workflowengine/src/components/Values/SizeValue.vue
+++ b/apps/workflowengine/src/components/Values/SizeValue.vue
@@ -1,6 +1,6 @@
 <template>
 	<input v-model="newValue" type="text" placeholder="1 MB"
-		@input="$emit('input', newValue)">
+		@input="update">
 </template>
 
 <script>
@@ -8,11 +8,13 @@ export default {
 	name: 'SizeValue',
 	props: {
 		value: {
-			type: String
+			type: String,
+			default: '1 MB'
 		}
 	},
 	data() {
 		return {
+			valid: false,
 			newValue: this.value
 		}
 	},
@@ -20,6 +22,19 @@ export default {
 		value() {
 			this.newValue = this.value
 		}
+	},
+	methods: {
+		validate() {
+			return this.newValue.match(/^[0-9]+[ ]?[kmgt]?b$/i) !== null
+		},
+		update() {
+			if (this.validate()) {
+				this.$emit('input', this.newValue)
+				this.valid = false
+			} else {
+				this.valid = false
+			}
+		}
 	}
 }
 </script>
diff --git a/apps/workflowengine/src/services/Operation.js b/apps/workflowengine/src/services/Operation.js
index ed996593cb..58c20d6db1 100644
--- a/apps/workflowengine/src/services/Operation.js
+++ b/apps/workflowengine/src/services/Operation.js
@@ -1,6 +1,3 @@
-import ConvertToPdf from './../components/Operations/ConvertToPdf'
-import Tag from './../components/Operations/Tag'
-
 const ALL_CHECKS = [
 	'OCA\\WorkflowEngine\\Check\\FileMimeType',
 	'OCA\\WorkflowEngine\\Check\\FileName',
@@ -13,27 +10,10 @@ const ALL_CHECKS = [
 	'OCA\\WorkflowEngine\\Check\\UserGroupMembership'
 ]
 
-const Operators = OCP.InitialState.loadState('workflowengine', 'operators')
-
+const Operators = {}
 /**
  * Extend operators for testing
  */
-Operators['OCA\\FilesAccessControl\\Operation'] = {
-	...Operators['OCA\\FilesAccessControl\\Operation'],
-	color: 'var(--color-error)',
-	entities: [
-		'OCA\\WorkflowEngine\\Entity\\File'
-	],
-	operation: 'deny'
-}
-Operators['OCA\\WorkflowPDFConverter\\Operation'] = {
-	id: 'OCA\\WorkflowPDFConverter\\Operation',
-	name: 'Convert to PDF',
-	description: 'Generate a PDF file',
-	color: '#dc5047',
-	iconClass: 'icon-convert-pdf',
-	options: ConvertToPdf
-}
 
 Operators['OCA\\TestExample\\Operation1'] = {
 	id: 'OCA\\TestExample\\Operation1',
@@ -51,14 +31,6 @@ Operators['OCA\\TestExample\\Operation2'] = {
 	color: 'var(--color-warning)',
 	operation: 'deny'
 }
-Operators['OCA\\FilesAutomatedTagging\\Operation'] = {
-	id: 'OCA\\FilesAutomatedTagging\\Operation',
-	name: 'Tag a file',
-	description: 'Assign a tag to a file',
-	iconClass: 'icon-tag-white',
-	color: 'var(--color-primary)',
-	options: Tag
-}
 
 export {
 	Operators,
diff --git a/apps/workflowengine/src/store.js b/apps/workflowengine/src/store.js
index 34cee25675..b38bef0e6e 100644
--- a/apps/workflowengine/src/store.js
+++ b/apps/workflowengine/src/store.js
@@ -24,7 +24,7 @@ import Vue from 'vue'
 import Vuex from 'vuex'
 import axios from 'nextcloud-axios'
 import { getApiUrl } from './helpers/api'
-import { ALL_CHECKS, Operators } from './services/Operation'
+import { ALL_CHECKS } from './services/Operation'
 import confirmPassword from 'nextcloud-password-confirmation'
 
 Vue.use(Vuex)
@@ -33,8 +33,7 @@ const store = new Vuex.Store({
 	state: {
 		rules: [],
 		scope: OCP.InitialState.loadState('workflowengine', 'scope'),
-		// TODO: move to backend data
-		operations: Operators,
+		operations: OCP.InitialState.loadState('workflowengine', 'operators'),
 
 		plugins: Vue.observable({
 			checks: {},
@@ -74,7 +73,10 @@ const store = new Vuex.Store({
 			Vue.set(state.plugins.checks, plugin.class, plugin)
 		},
 		addPluginOperator(state, plugin) {
-			Vue.set(state.plugins.operators, plugin.class, plugin)
+			plugin = Object.assign(
+				{ color: 'var(--color-primary-element)' },
+				plugin, state.operations[plugin.id] || {})
+			Vue.set(state.operations, plugin.id, plugin)
 		}
 	},
 	actions: {
@@ -88,7 +90,8 @@ const store = new Vuex.Store({
 			let entity = null
 			let events = []
 			if (rule.isComplex === false && rule.fixedEntity === '') {
-				entity = context.state.entities.find((item) => rule.entities[0] === item.id)
+				entity = context.state.entities.find((item) => rule.entities && rule.entities[0] === item.id)
+				entity = entity ? entity : Object.values(context.state.entities)[0]
 				events = [entity.events[0].eventName]
 			}
 
diff --git a/apps/workflowengine/src/workflowengine.js b/apps/workflowengine/src/workflowengine.js
index 6e22852b82..cae85c3c24 100644
--- a/apps/workflowengine/src/workflowengine.js
+++ b/apps/workflowengine/src/workflowengine.js
@@ -4,6 +4,7 @@ import store from './store'
 
 import Settings from './components/Workflow'
 import FileValues from './components/Values/file'
+import {Operators} from './services/Operation';
 
 /**
  * A plugin for displaying a custom value field for checks
@@ -21,7 +22,7 @@ import FileValues from './components/Values/file'
  * A plugin for extending the admin page repesentation of a operator
  *
  * @typedef {Object} OperatorPlugin
- * @property {string} class - The PHP class name of the check
+ * @property {string} id - The PHP class name of the check
  * @property {string} operation - Default value for the operation field
  * @property {string} color - Custom color code to be applied for the operator selector
  * @property {Vue} component - A vue component to handle the rendering of options
@@ -40,6 +41,8 @@ import FileValues from './components/Values/file'
  * Public javascript api for apps to register custom plugins
  */
 window.OCA.WorkflowEngine = Object.assign({}, OCA.WorkflowEngine, {
+
+
 	/**
 	 *
 	 * @param {CheckPlugin} Plugin
@@ -58,6 +61,7 @@ window.OCA.WorkflowEngine = Object.assign({}, OCA.WorkflowEngine, {
 
 // Register shipped checks for file entity
 FileValues.forEach((checkPlugin) => window.OCA.WorkflowEngine.registerCheck(checkPlugin))
+Object.values(Operators).forEach((operatorPlugin) => window.OCA.WorkflowEngine.registerOperator(operatorPlugin))
 
 Vue.use(Vuex)
 Vue.prototype.t = t