A full day's work doing one shelf. Fabricated from 2 pcs 0.032 Alclad and a 1/2x1/2x3/8 angle. Lots of card stock trying to figure out how to level the shelf--but for the TXPNDR, it doesn't matter!!! With two pieces, just need to make one bend for the shelf, and no funky bevel for the vertical support. Made a bevel-ended anvil about 1/2" long for to pull the rivits on the top stringer.