Probably just going to get a replacement, lock the front and keep wheeling it for now.
Those were my thoughts too.Given how much he has it torn down I'm thinking he's doing disc brakes.
So, why's the rear coming apart?
Looks awesome man, nice pile of upgrades.
What are you doing for an E-brake? I still need to address that on mine.
Swapping out your proportional valve too? I put a disc/disc valve on mine, but my rears still lock up before the fronts. I'm planning to put a regulator in the rear brake line to fix that.