The backup camera wiring turned out to be loose, works fine now after putting some proper connectors on.
Installed some Infinity 4" speakers in the dash using 3d printed adapters- had to cut the mounting tabs off the speakers. Cut one side too far and had to secure the speaker with epoxy, figure I won't need to replace it again for years if ever, the other side I was more careful and they're sandwiched between the grill and the adapter ring.
https://www.thingiverse.com/thing:4816079