Still no physical modelling as of yet. I've been working in solidworks and learning its nuances and ways to get this all done. I have been able to create a new wheel center, wheel sleeves that are 11" and 9.5" wide, as well as a wheel stop. The way this will work is, the wheel stop is adjusted to the depth I need for the backspacing I want, then it will be mated to the outer sleeve. Once that is done, the wheel center will be mated to the stop. I've got the stop "drilled" for bolt heads, to mimick the wheel being blind fastened from the back side. Those bolts will be machined pieces.