Sorry, I'd say I was waiting so everyone had a chance to solve it on their own, but I forgot to post the solution.
Bad timing too because last night I "cleaned up" some files/folders and now I can't find my original models for this challenge. I'll keep looking, there's only two places I would have stored it.
But the technique can be described in words:
- Create a "flat pattern" as a single extrusion containing all the holes, slots, fillets.
- Using sheet metal tools apply a Sketch Bend to form the required bent part.
It's a solution that only needs two features (extrude, and sketched bend). But SW puts additional entries in the feature tree for sheet metal parts. That's why some of the solutions show 4 features.
There might be a solution using one of the Deform tools to solve this without getting the additional feature tree items, but I hate those deform tools. I'll let someone else experiment with them.
Found my file: