Yes I think we should be allowd tube uppers.
1- its easier to adjust shims becouse its hollow middle.
2- its less weight.
3- its way cheaper, after you strip a parts car, buy new bushings, and install them, you have wasted time and money cutting, hammering, and driving all over the place.
I am trying to get opions from people, I would like to go to tubulat control arms on the uppers, it makes alot sense to me, but I wanted to see what other people think. Tubualr Arms are safer and more ecnomical, two things that every racer wants, a better part at a better price.