Decent thickness of the panel. Seen two panels in Cessna recently that radio racks were falling out or cracked through supports . They were fine back in the day when they had only two Comms. 0.063" or 0.080" . T3 is best but if its a home built I would go commerical
If you are CNC cutting the panel and you are tight for space consider cutting a perspex panel first and trial fitting the instruments.
Fit an avionics master.A guy came to me with a flat battery in an RV. He had all avionics and lights set through the one master switch. Most of his CB's were of the non pull type.
If you are a tall pilot remember the glare shield can obscure your view of some instruments . Mostly the audio panel.
Use self retaining hardware , don't rivet your racks in . Yes that does happen.
The Mid continent USB chargers are awesome. Great if you considering using an ipad or phone.
Consider powder coating or using screws with plastic washers
Just random thoughts
