You can talk/clarify/explain/more talk/more clarify about what you want mate. Ive no interest in all of that tbh! lol
I just want to build a cheap car and go racing. If I get there and after the first race have to change a couple of things so be it. I'm certainly not going to cry.
As tony and others are pointing out, 15 inch wheels ARE going to be allowed. So you questioning it isn't going to make any difference is it? Thems the rules. As for cup wishbones, if someone can spot them from looking at a parked non cup car, they're a better man than me. Although I don't care because I have a cup.