I had this problem, when i had aluminium snail cams, i had to put two washers on both sides of the frame, between the snail cams and the hub spacers. In this way i was able to tighten the hub bolts much more, it worked okay. Im running echo tr steel snail cams now, which is 10x times better than the alu ones, and now i dont use any washers, and the wheel stays still...