Awesome. that answers a couple of my questions.
Why wouldn’t you be able to go all the way around the tube?
I would be using it for coping tubes for rollcages, etc. My thought was to draw up a model of intersecting tubes in solidworks that would automatically update the tube notch when you change the angle. You change the angle, unroll the tube profile and you should have your 2d geometry.
Now i just need to work on the unroll function in Solidworks and see if i can get it working well.