Panelling Unroll slices

I make sculptures in steel, I take an image built it into 3 D and slices with the “contour” command, right now I do each slice manually by using “Offset CRV” to reduce final weight of the sculpture and insert a number for later reconstruction of the sculpture. I do all this one by one slice which is very tedious and sometimes takes a few days to complete. I tried the panelling “unroll faces”, it does unroll but the order of placement is totally mixed up, is there a way to unroll in the right order so the very bottom slice is at one end and the last slice at the other end of the Cplane.
Please help.
MarcelMan Facing bent stairs.3dm (8.9 MB)