So far the only idea for expanding the frame I have seen is from Richard Barbosa which doesn't seem to be getting much attention. https://forum.e3d-online.com/index.php?threads/bigbox-frame-remix.2395/ I was thinking maybe going this direction but in the US 5mm plywood may be difficult at best to acquire and I don't think I personally want to spend the money on acrylic and have no way to cut acrylic. So firstly how automatic is it to adjust the thickness of the frame files, can it be done easily? My second thought is to go somewhat down the MPCNC route Making the frame from printed parts and conduit would be cheap and easy, I also think it would fairly ridged. I can see how to attach the X and Y to a frame like this but I am drawing a blank for the Z axis. As I don't think any of us would want to use the MPCNC's motion system just the frame. later non structural thin plywood facade could be added to give it a finished look and maybe even create a heated enclosure. Anyone have any better thoughts or additions?