AKS, chap called Paul I dealt with, really helpful and good to deal with. Not fitted it yet, but the weight difference between that and the Airtech is huge !. The airtech weighs a order or magnitude more than the Peron.
I have heard only good things about the Peron so bit the bullet. Prob not the wisest money I have spent as I already have the airtech stage 1, but wanted to give Nick the best chance of getting everything he can.