They are extremely helpful. They let us out into their workshop to use the clutch clamping measuring machine to compare clutches when upgrading even when they're not sellingus the clutch.
I'm probably going to go back to the clutch I was previously running that I got from Western, it was pretty cheap like $160 from memory.
I upgraded to the larger 3.0lt flywheel and larger pressure plate thinking it would definitly be better for the increased power but it is slipping when I turn up the boost. I'll probably go back to the original setup, it never slipped and was quite cheap.
Your clutch is different though to conventional clutches, the r154 has a "pull" type pressure plate whereas most others have push type. This setup is more expensive but meant to be better, give them a call.