We’ve just released our beta version of a FRED JSON writer. It takes the hard work out of creating the JSON for options and option sets. Please check it out and let me know what you think:
https://www.inside-creative.com/resources/modx-fred-json-editor/froson.html
Love it 
Perhaps a tooltip on the Complete and Remote toggles would be good? Apart from that it’s very user friendly I think. Super 
Thanks for the Feedback, I’ve added the tooltip messages. Not 100% sure if they make sense though. Might need to think of better phrasing.