Anybody fancy building a multi-band dynamic-delay FX unit?

I scribbled a design for a multi-band dynamic-delay unit years ago - found the original post-it note recently and thought, I want it but I'm not smart enough to build it.

I built a little test version using VST's on Reaper; routing an audio signal into several tracks, filtering each track with a plugin, inserting a side-chained delay unit on each filtered track creating a basic dynamic delay for each band.

The concept is solid (I think) but my skills and knowledge are not.

Help. Please.

I'd love to tinker with or commission a physical circuit version in the future so I can have this as an effect pedal.