hmmm, while I like the idea of including offset......that calculator tells me that the wheels that are currently on my blue car are about 15mm through the strut

17x7.5 +53 (measurements of '04 sti wheels and v7 sti wheels)
Now, if they took that same calculator, included a place for you to measure the depth of the hub, the height to the base of the spring perch, height to the top of the spring perch and the diameter of the spring perch.....that would cover everything except caliper clearance (since that varies depending on wheel design)
maybe I should fiddle around with making one
