The handbrake had to be removed, as the brakes kept locking on and finally worked out the valves inside the handbrake were around the wrong way (not sure how this happened). Anyway much brake fluid going everywhere, refitted and started the plane again (this is fun) and proceeded to bed the brakes in. Now they work as does the handbrake. My Co-Pilot (my son) sitting in the pilots seat, after taxiing around bedding in the brakes, now just need to finish off the paperwork and have a C of A issued.