I have a set of custom Galfer rotors but found they have a great deal of play. The play was so bad I thought the front shocks or steering head had play. When riding it's not noticeable but slow manoeuvre's really show off the problem.
It's funny how these things play on your mind and affect confidence. I have decided to source a set of Brembo Supersport disks which are thicker and probably better quality.
These discs are used in BSB and WSB as well as the TT so such all abilities on track and road. They also complement the Brembo M4 calipers fitted to the bike.