Well done, have you run the newly rebuilt engine yet? Well I can comment on the floating disc as I am running one. It's a very simple straight swap. Best in combination with EBC HH pads and a steel braided hose - gives you modern braking. Just make sure you torque the disc retaining nuts to the right value and in the recommended sequence and follow the instructions in the manual for removing and replacing the front wheel (pumping forks to align and then tightening all the fasteners in the right sequence). Good luck.