Tabed blocks to metal surfaces with double sided tape and clamped to bench top.. This took multiple tries because the blocks kept slipping even with the double sided tape. After I got bend started with wood block, I used my rivit gun and flush head set and low power setting to pound the tab flat and make nice bend line.
This also took me too long to figure out and get set up.
Marked center line and drilled 2 size #40 holes for the blind rivits
Bending blocks cut to taper and taped on to skin for tab bends
Using the rivit gun on super low setting to finish edge