Right - had a good session out yesterday with my home made det cans and a friend driving the car whilst I was tuning and listening for det. 1st thing is I'm miles away from any kind of det - didn't really notice any until about 44deg BUT we could already feel performance dropping off. With a fair few 3rd and 4th gear pulls and a g-tech (and half a tank of fuel), this is where we ended up and it feels really strong and smooth - very happy with the results. Re-visited the fuel map as well and made a few tweaks. Thanks for the advice guys