This has got my brain tied in a knot. Read this thread and felt you folks would have good insights. I have pieced together a spindle/hub/rotor combo that would require a 1" thick spacer to work. Using a 1 piece spacer and 10.9 mounting bolts, will this hold? My concerns are bolts shearing or the cast iron spindle snapping from the added leverage, neither of which I want to discover by test drive. Also wondering if it would induce vibrations during braking. If OK, then do I need to make the spacer from steel or will 6061 t6 suffice (being lighter and easier to machine).