Help Splitting Closed Polysurface with Non-Planar Surfaces

So in order to fabricate this tubular model, I am trying to split a closed polysurface into smaller segments that can then be unrolled. I have been trying to use Split Brep Multiple for the most part, but my issue I keep coming across is that some of the edge loops I am trying to turn into cutting surfaces end up being non-planar which then screws everything up.

Please let me know if you guys can think of any solutions. Thank you!

Inflatable from Curve.gh (39.8 KB)

missing

R8 apparently. Even so…