Im running off the shelf VF tuning for my Stage 2 kit but i also have DSR 256 cams. I am running lean (pinging a little) at the top of first and second. Can i richen up the mixture a bit with an adjustible FPR? If so do i just start at 4bar (thats whats in there now) and go higher from there? Ive never played with an adj FPR. Does anyone sell a kit for VW's? I know estuning sells one but they are on backorder. Thanks.