I just thought of something. The way I use FX chains is with a simple macro:
This allows me to save some clicks when inserting a single plugin like an EQ or Comp for exemple or a more complex chain.
Instead of inserting single fx or complete fx chain, then click on arrange to focus, hit spacebar, select the FX(s)to pop them up and tweak...
With this macro one click or shortcut it pops up the plugin with arrange already focused I hit spacebar and tweak plugin.
I was wondering if it might be a good idea to implement your script with macros what do you think ?
The big advantage of your script for me compared to buttons is drag and drop images not having to resize and make a 3 part button in Inkscape it's a big time saver plus it's nice to have big beautifull images of those plugins that we like so much! + the extra goodies that you keep adding!