Been using a store-bought brake to bend 4130 steel sheet, .025" thick, into ribs for airplanes for decades now. Every time, the taper of these ribs (7/8" or 3/4" wide at one end, 3/8" or 1/2" at the other end) gets in the way of the last bit of bend because of the nosepiece thicknesses of all brakes I've tried.
Since usually the tails on these airplanes taper, it's not smart to make a press brake die set because each rib pair is a new length. And since most of these tails are covered in fabric, there's a 20-30 degree "kink" along each rib's edges to make sure you don't chafe the covering.
Sheet 4130 has a good amount of springback, too.
All this means there's no great cool way to fab these bent-up ribs, without having to go back and hand-straighten or close up the narrow ends when you're nearly done. That's so amateur-time.
What's needed is a brake with a very thin nosepiece (like 1/4"?) but this nosepiece only needs to reach in about 3/4"-1" max after the 90 degree bends. If there was a secondary operation like a set of roller dies to run along the length of the tapered bent ribs to do the fabric-proofing-kink, that'd be OK.