This plugin is similar to the menu to add event support in LV2018 - but it was suggested that I post this on here anyway. For me, this is a more convenient way of creating value change events as they are the events I/we make most often. This tool has fewer nested right-click menu items, and you can create events for multiple controls at once.
Also, I didn't realise 2018 has a similar tool when I initially wrote this. When it was pointed out to me, I did copy and paste the event-checking section of code.