diff --git a/client/homebrew/editor/metadataEditor/metadataEditor.jsx b/client/homebrew/editor/metadataEditor/metadataEditor.jsx
index ac644f1a1..227993ebd 100644
--- a/client/homebrew/editor/metadataEditor/metadataEditor.jsx
+++ b/client/homebrew/editor/metadataEditor/metadataEditor.jsx
@@ -250,6 +250,8 @@ const MetadataEditor = createClass({
 
 	render : function(){
 		return <div className='metadataEditor'>
+			<h1 className='sectionHead'>Brew</h1>
+
 			<div className='field title'>
 				<label>title</label>
 				<input type='text' className='value'
@@ -283,8 +285,6 @@ const MetadataEditor = createClass({
 				values={this.props.metadata.tags}
 				onChange={(e)=>this.handleFieldChange('tags', e)}/>
 
-			{this.renderAuthors()}
-
 			<div className='field systems'>
 				<label>systems</label>
 				<div className='value'>
@@ -296,6 +296,23 @@ const MetadataEditor = createClass({
 
 			{this.renderRenderOptions()}
 
+			<hr/>
+
+			<h1 className='sectionHead'>Authors</h1>
+
+			{this.renderAuthors()}
+
+			<StringArrayEditor label='invited authors' valuePatterns={[/.+/]}
+				validators={[(v)=>!this.props.metadata.authors.includes(v)]}
+				placeholder='invite author' unique={true}
+				values={this.props.metadata.invitedAuthors}
+				notes={['Invited authors are case sensitive.', 'After adding an invited author, send them the edit link. There, they can choose to accept or decline the invitation.']}
+				onChange={(e)=>this.handleFieldChange('invitedAuthors', e)}/>
+
+			<hr/>
+
+			<h1 className='sectionHead'>Privacy</h1>
+
 			<div className='field publish'>
 				<label>publish</label>
 				<div className='value'>
diff --git a/client/homebrew/editor/metadataEditor/metadataEditor.less b/client/homebrew/editor/metadataEditor/metadataEditor.less
index f0974fb6c..be1a9aa9c 100644
--- a/client/homebrew/editor/metadataEditor/metadataEditor.less
+++ b/client/homebrew/editor/metadataEditor/metadataEditor.less
@@ -10,6 +10,15 @@
 	height           : calc(100vh - 54px); // 54px is the height of the navbar + snippet bar.  probably a better way to dynamic get this.
 	overflow-y       : auto;
 
+	.sectionHead {
+		font-weight: 1000;
+		margin: 20px 0;
+
+		&:first-of-type {
+			margin-top: 0;
+		}
+	}
+
 	& > div {
 		margin-bottom: 10px;
 	}
@@ -30,6 +39,7 @@
 	}
 	.field{
 		display       : flex;
+		flex-wrap     : wrap;
 		width         : 100%;
 		min-width     : 200px;
 		&>label{
@@ -78,6 +88,11 @@
 				font-size   : 0.8em;
 			}
 		}
+
+		small {
+			font-size  : 0.6em;
+			font-style : italic;
+		}
 	}
 
 
@@ -128,10 +143,6 @@
 		button.unpublish{
 			.button(@silver);
 		}
-		small{
-			font-size  : 0.6em;
-			font-style : italic;
-		}
 	}
 
 	.delete.field .value{
@@ -196,6 +207,7 @@
 	}
 	.field .list {
 		display: flex;
+		flex: 1 0;
 		flex-wrap: wrap;
 
 		> * {
diff --git a/client/homebrew/editor/stringArrayEditor/stringArrayEditor.jsx b/client/homebrew/editor/stringArrayEditor/stringArrayEditor.jsx
index 790cfba95..4fc570cef 100644
--- a/client/homebrew/editor/stringArrayEditor/stringArrayEditor.jsx
+++ b/client/homebrew/editor/stringArrayEditor/stringArrayEditor.jsx
@@ -9,7 +9,9 @@ const StringArrayEditor = createClass({
 			label         : '',
 			values        : [],
 			valuePatterns : null,
+			validators    : [],
 			placeholder   : '',
+			notes         : [],
 			unique        : false,
 			cannotEdit    : [],
 			onChange      : ()=>{}
@@ -83,7 +85,8 @@ const StringArrayEditor = createClass({
 		}
 		const matchesPatterns = !this.props.valuePatterns || this.props.valuePatterns.some((pattern)=>!!(value || '').match(pattern));
 		const uniqueIfSet = !this.props.unique || !values.includes(value);
-		return matchesPatterns && uniqueIfSet;
+		const passesValidators = !this.props.validators || this.props.validators.every((validator)=>validator(value));
+		return matchesPatterns && uniqueIfSet && passesValidators;
 	},
 
 	handleValueInputKeyDown : function(event, index) {
@@ -123,17 +126,21 @@ const StringArrayEditor = createClass({
 			</div>
 		);
 
-		return <div className='field values'>
+		return <div className='field'>
 			<label>{this.props.label}</label>
-			<div className='list'>
-				{valueElements}
-				<div className='input-group'>
-					<input type='text' className={`value ${this.valueIsValid(this.state.temporaryValue) ? '' : 'invalid'}`} placeholder={this.props.placeholder}
-						value={this.state.temporaryValue}
-						onKeyDown={(e)=>this.handleValueInputKeyDown(e)}
-						onChange={(e)=>this.setState({ temporaryValue: e.target.value })}/>
-					{this.valueIsValid(this.state.temporaryValue) ? <div className='icon steel' onClick={(e)=>{ e.stopPropagation(); this.addValue(this.state.temporaryValue); }}><i className='fa fa-check fa-fw'/></div> : null}
+			<div style={{ flex: '1 0' }}>
+				<div className='list'>
+					{valueElements}
+					<div className='input-group'>
+						<input type='text' className={`value ${this.valueIsValid(this.state.temporaryValue) ? '' : 'invalid'}`} placeholder={this.props.placeholder}
+							   value={this.state.temporaryValue}
+							   onKeyDown={(e)=>this.handleValueInputKeyDown(e)}
+							   onChange={(e)=>this.setState({ temporaryValue: e.target.value })}/>
+						{this.valueIsValid(this.state.temporaryValue) ? <div className='icon steel' onClick={(e)=>{ e.stopPropagation(); this.addValue(this.state.temporaryValue); }}><i className='fa fa-check fa-fw'/></div> : null}
+					</div>
 				</div>
+
+				{this.props.notes ? this.props.notes.map((n)=><p><small>{n}</small></p>) : null}
 			</div>
 		</div>;
 	}
diff --git a/client/homebrew/pages/editPage/editPage.jsx b/client/homebrew/pages/editPage/editPage.jsx
index 0f6c5387e..61c42297d 100644
--- a/client/homebrew/pages/editPage/editPage.jsx
+++ b/client/homebrew/pages/editPage/editPage.jsx
@@ -330,6 +330,17 @@ const EditPage = createClass({
 				</Nav.item>;
 			}
 
+			if(this.state.errors.response.error.status === 409) {
+				console.log(this.state.errors.response);
+				const message = this.state.errors.response.body?.message;
+				return <Nav.item className='save error' icon='fas fa-exclamation-triangle'>
+					Oops!
+					<div className='errorContainer'>
+						{message ? message : 'Conflict: please refresh to get latest changes'}
+					</div>
+				</Nav.item>;
+			}
+
 			return <Nav.item className='save error' icon='fas fa-exclamation-triangle'>
 				Oops!
 				<div className='errorContainer'>