add some Tee nuts to the sides to hold the rack rails,
i used 3/4 angle, should have used 1 inch,
i stuck a tap in the drill press and used the on off sw to make a power tapper, the fan belt slips if you leave the pwr on too long, so no worries about flying angle iron,
you can tap 40 holes by hand, if you are a bass player,
speakin of bass players, full props out for Larry Graham, re inventing the Funk, back when he could have gone cheezy disco, he reinvented the Funk.
Prince? that midget jimi hendrix copycat, don't get me started on prince,