As for that radio bracket mounting issue...

Installing a mount that actually fits on the trim piece - a little RTV silicone gasket goop to help it stick better was also used.

Excess wipes away easily enough.

Here's one possible configuration (I still have an additional 6" long arm and dual-ball joint to utilize). Problem is, it's so TOP heavy, I know it'll NEVER hold on this ball and where it's mounted (trim), even with city driving.

KNOWING that would probably be the case, I ordered THIS double joint SPECIFICALLY, to provide an additional mounting point. Perhaps bolted to some 1/8" sheet plate, screwed in alongside the console on the passenger's side for stability.

Shoot - I may just end up using 1/8", 2' long brackets mounted to either side of the console, to mount them above the console thusly! They've GOT to go there anyways - it may be back to the drawing board altogether on the radio mounts.