The q-loader is an alligator product. I don't think you can use it with a A3/B4 though. I just got a alligator tune for my truck(AHU). I told him I wanted 22psi ish for boost and to electronically delete the egr. It works great so far, its exactly what I asked for. I couldn't get ahold of rocketchip so the choice was simple.
Before the chip I ran two boost controllers, one for the turbo and one to make sure it got no more than 14-15psi. This worked fine for over a year with no limp issues. My truck would hit limp constantly before I added the boost controllers.