Hi Burr, I'm not sure if it will happen for v4 or not yet, but I will be spending a chunk of time seeing how much work will be involved. It's not ACIS though - it's called KCM. It's possible that I might try doing it in stages, like doing filleting and shelling with it.

Don't get too overly excited quite yet though - I can't promise that it will happen for v4 yet.

- Michael