I assembled the polyflow brake lines between the reservoir and pilot-side brake cylinders. It proved to be very difficult to push the plastic line onto the metal fitting, either because of the excessively tight fit or perhaps the cold temps. I deburred the inside opening of the plastic line with the deburring tool and used a slow drill bit that was exactly the inside diameter of the line to clean out the inside, then it was possible, but very difficult, to assemble the fittings.

After discovering I'm short on nipples to screw into the brake cylinders and parking brake valve, I moved on to attaching the parking brake valve. I used mounting tabs under the forward fuselage floor (that were originally meant for a fuel valve) to attach a bracket for the parking brake valve and also a clamp to hold the end of the control cable.