I am contemplating building my build with M8 bolts instead of the M5 bolts partially due to I cannot find a M5 bolt long enough for what I want to do, and partly for added strength. I plan to use the 688z 8x16x5 bearings in the parts store as well as the 0.062" thick spacer in between the bearings. Would this be an issue since the shim is 1.575mm thick instead of the 1.0mm shim that comes with the wheel kits? If not, can anyone forward me to a good supplier of 8mm ID precision shims? Thanks!