My edition 30 has developed a horrible knocking grinding noise when clutch pressed and intermitatly the clutch pedle sticks half way. Having looked at it I have found the gearbox input shaft has play in. I've seen some other posts about this but all a few years old just wondering if anyone has come up with a fix or knows any where that can machine the casing due to bearing spinning in case. Any help will be a big help. Thanks.