If you look in ReaPack you should find JS_Track FX Grouping.lua made by Julian Sader. This script takes the hassle out of controlling the same fx on multiple tracks.
When tracks are in the same group with VCA enabled, this script will find plugins with the same name and link all their parameters. No MIDI linking hack required!
At the time of recording this it clearly has some bugs, and sometimes breaks but hopefully that will be improved in time.
When it works it is wonderful and a massive time saver and definitely worth trying.
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