This is the standout pick in a list otherwise dominated by factory promo reels. BugeyeBob is restoring a Subaru 360 (the "Lazarus" project), and he's hit the classic vintage-restoration wall: the reproduction patch panel he needs won't be made for another year, and the panel requires pressed-in stiffening ribs that you can't just hammer in by eye.

His solution is to build his own sheet metal forming die — essentially a male/female tool set that presses the rib profile into flat steel under hydraulic pressure. This is genuinely useful knowledge for anyone doing bodywork, custom fabrication, or one-off panel repair, because commercial dies are either unavailable or absurdly expensive for obscure shapes.

Expect to see die design considerations (clearance for material thickness, draft angles, how to keep the workpiece from wrinkling or tearing), material selection for the die itself (typically a hardenable tool steel or even cast/machined mild steel for low-volume runs), and the press setup. The educational value here is high: it bridges the gap between "I have a press" and "I can actually form the shape I need," which is the step most hobbyists skip and then wonder why their parts look terrible.

Small-channel content from someone actually solving a real restoration problem — exactly the kind of thing worth supporting.