I have recently been working on a system for creating interchangeable effect slots within Cabbage. The Multiband FX plugin recently posted on this thread uses the slots system to give the user to load in a variety of effects. I think this could be useful for synthesis source management and output effects as well.
Anyways you can find the download and a tutorial on how to use the system here
I just took a quick look through the video. Seems like a very clean way of organising and managing effects. Thanks for sharing. I’ll have to look at the MultiBand FX plugin when I get a chance. 