Ive used this adjustable system for several seasons , in fact i Bought Phils when he advertised it as it was Cheap compared to what they ususally are. I previously had a bleed valve in the car which came with it ,it blew out at Snetterton costing me a 3rd place and wasn't best pleased, this new system is very adjustable , very accurate and very simple . It did however tempt me to " tweek the boost " down the straight to clear back markers which did lead to high ACT's , but a bigger intercooler will sort that for this car. As long as you are sensible it works very well , the car was responsive and it allowed for changing conditions , like a damp track . RS components are very easy to deal with , i hold stock of most of the Norgren 6 mm Pipe ends to make these kits up now.