The factory stereo in my 2012 TRD Sport is garbage and I blew the rear speakers 10 minutes after picking up the truck. I decided to put my old stereo in and make some upgrades. I'm disconnecting the rear speakers in the headliner, putting components in the doors, the sub and amp behind the drivers seat, and some marine speakers in the bed, switched for tailgating.
So far I've run the power wire, ground, remote, and ran 2 sets of speaker wires up to the dash. The 4ch high/low level converter just came in, and I'm waiting on the RCA's to show up. Sub has quick disconnects so I can take it out if I need the space. Throw a towel over the amp if some needs to sit there (highly unlikely).
I'll update more once I wire the dash and put the speakers in the bed. If people want it I can make a how-to.