Another problem was that the pads were only contacting on the inside of the rotors on both sides.
Sounds like the calipers weren't sliding on the pins. Do they easily slide back and forth with the brake released and the piston pushed back? The pins need to be straight and also slide through the bushings. If they bind anywhere you'll get a drag.
I'd have to agree, but I've lubed the hell out of the sliders, rubber and pins with Silglide. Slicker than a cat's azz. Pins are new with the kit.
I've been leading towards the metering portion of the Prop valve myself.
I got called off to work and probably won't get to it until next weekend, maybe.