I was in on the first group buy. I had to modify my brackets to fit properly. If the brackets were spot on, I wouldnt have had any issues whatsoever. The install was a bit rough only because of this. +1 on the welds, they are beautiful.
Helix has since modified their brackets so it should be a very simple install. One of the best mods imo, especially if you live in the south. I run a stock map with the intercooler to save my snails during the summer.