Try Safetek they have a good racing lining and will put it on thick for turning
Always use it on my Vincent brakes
Do up your nuts with brake on to ensure concentricity
There is also a school of thought (and belive me in the VOC compensators have been talked to death) that after a short while so long as the pull of the lever is split the wear on the linings will equal the pressure to each shoe set.
Finaly ensure you have a good handlebar lever fitted firmly with the maximum leverage twixt pivot and nipple
