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There is this script that does the simpler version of that geometry. It does it in 3d coordinate space instead of the 2 dimensional flat domain though and you'll probably want to lean on qCorrespondingInFlat to make things easier to navigate. I have a custom tab and slot tool I had @Caden_Armstrong cook up that does some 3d to 2d sketch patterning magic to make tab and slot geometry work on bent / rolled faces which I'm in the middle of a rewrite of to handle more specialized cases than we originally planned for.

In short: very doable.

I recently used SendCutSends recommended cut pattern to make hand bending of sheet metal possible. I really love the results. The only downside is that the sketch took a fair bit of work to layout and update. I was wondering how hard it would be to create a custom feature script to set the necessary parameters and create the sketch entities. You can read more on the ScS website here.

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@chadstoltzfus  Cutlist+ is for frames. Measure Cut List is for generic use with things like cabinets. I should probably merge them into one feature. Measure Cut List will also name the parts so that you can have them show up in the bom list with sizes, or you can keep them in the part studio and use the custom table it produces to view the cut list.

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If you share the document URL, someone will be able to help you out. Be sure you're not lofting regions or profiles with inner loops. That's not allowed.

I would highly recommend not using profile generator. It creates pretty lumpy curves which are not going to help you. Instead use HAVF: https://forum.onshape.com/discussion/24730/new-custom-feature-havf-profiles-standard-airfoil-profiles

Also offsets of offsets are often crappy curves. You're better off offsetting from the original and doing the math to get the result you want.

Are you trying to loft the face which is defined by the inner and outer profiles at the same time? Loft can't handle faces with holes in them. You would need to do two lofts.

Possibly this is because the uses of the feature in your example are linked to a version, and not from the active workspace. Try adding an example use of the feature from the toolbar area called "Custom features in this workspace"

The features used are still liked to a version in this screenshot as indicated by the icon to the right of them. I just did a test, and that does seem to prevent it from working. If I add one from the workspace it works.