I have a tank that has an offset cone. ( Large diameter at top tapering down to small diameter at the bottom but not concentric). It is composed of plates of steel that need to weld together to make up the complete cone.

Is there a way to unfold a lofted piece and then rip it into smaller pieces?

I have tried a sheet metal loft and then cut the loft up into smaller pieces but I cannot select an edge on the Flat-Pattern Feature that is generated by a cut. I cannot seem to be able to figure out how a rip feature works on a lofted piece. Any help would be appreciated.

Thanks