| Shouldn't need to touch the pinch bolts as it's the axle you are driving them into. Sounds to me like they are to big. I wouldn;t go ramming them home otherwise you will struggle to get em out again. If you can get hold of a vernier and measure the inside diametre of the axle and the outside of the protectors, the latter should be slightly smaller than the former. If not, send them up to me and I'll machine em for you. | 
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