So I've been playing around, building custom components for APEX. My main thing was trying to build sort of custom viewer states, by using APEX instead of writing a whole new custom state.
Here's some tests : a polyextrude state, carve, transforming vectors and copy and transform to build stairs.

I used to do similar tool using the rig pose pre-h20, it amazing the stuff you can build when you think outside the box, I hope more people will realise it more than rigging !

Nice demo!

Yeah I used the rig pose viewer state before to make a custom viewer state and this is what gave me this idea !