I would love to see how you get the cab only in a mechanism that rotates it. Please elaborate! I have one to rotate the frame, but I haven't figured out an elegant way to rotate the cab. My wish list would be like this:
1) full 360 degree rotation in all planes.
2) ability to place the cab on the frame all by yourself
3) ability to raise and lower in any position. I don't need that much raise/lower, just maybe 3 feet or so.
4) wheels that lock on all 4 corners to make it easier to pinpoint place the cab wherever I want.
This is a real problem for me with titanium rods in my back. Thus why I spend lots of time making shop helpers to resolve things just like this. Easy for you, might be next to impossible for me. Altho I have given this very issua lots of thought, never came up with anything that was workable. Easier to offer 4 of my nephews a beer or three to do whatever I need. Sadly, its just not convenient to call on the kids. Uncle Deve can end up being persona non grata!