It would be a was of time and money Toff. And tbh why try and change the map thats already in it? the AFR thats build in it will adjust its self to what ever spec you are running anyway!. Also i agree with what sorty is saying some what about a piggy back ECU been abit better IF you are planning on running over 200BHP but if you are planning on Running 200BHP or there abouts then a plug & play is worth every penny!. It depends on how healthy your engine is i know a few people like socks that have got over 200bhp running a Plug & Play ecu and i know some people that have got just under 200BHP useing a Plug & Play like John on here think he just got under 200bhp so he hopped for a piggy back but only gained a few BHP and a few torque but a few 100 quid down iwas it realy worth it? Pluss john was running abit lean thats one of the reason he hopped from a Piggy back but there is other way of sorting that out like advanceing the timeing and shotting a fpr (whitch Zisco adviced me to do) on which would of been alot cheaper then buying a piggy back then getting it mapped etc. We all have our own views on this but i have tried every method in the book i even Hopped for an apexi power FC on my old car and only gained about 2bhp over the plug and play Also Toff are you talkeing about Richard @ motorscope?