Tonight I riveted the angles onto the panel, then finished drilling screw holes, countersinking, priming and re-assembling. I'll cut a 3" hole for the standby EFIS later and be ready to make a blanking plate with a 2 1/4" hole for the old TSO'd wet compass if CASA hasn't stepped out of the 18th Century by the time I fly. I put the standby EFIS up high to the right so the passenger can see it.