i had a uprated helix organic cluth fitted and i dint get the flywheel skimmed, th ecar seriously judders in first and even low second.I may be uprating my gearbox, so itl be a engine out job. Any idea on how much im looking at to have this new gear box fitted? also i been told the problem was not skimming the flywheel, even tho the clutch was fitted about 8k miles ago can i skim the flywheel now to resolve the juddering?