I've got a Helix organic clutch which has been pretty well abused, launched and WOT shifting on the limiter. Not too heavy in traffic and car parks, for me anyway. Seemed to holding up pretty well, second friction plate the covers seen too. I make well under the rated torque though and always get the flywheel refaced. I run a standard flywheel as well, they carry more inertia so feel a little less urgent, harder to stall.