| Well .... that's been a bumpy ride for sure. I took advantage of the custom map which I ended up getting for £30, but there was a flat spot at around 6k - just about where the next gear comes in when fast(ish) road riding. I was invited to bring it back and it went on the dyno again. There was a big dip in the fuel/air mixture (very rich) so they tuned that out. Trouble was, it affects the power response elsewhere too. Got the messy bit at 6k tuned out, but it was horrid further down which I didn't notice until later. Also, the throttle response was all gone, really flat when you opened it up.
Up shot of it is, I decided to try a standard map from Dynojet. They do one for 2004 749 with asymetric Termi and std of aftermarket filters. (M715-504 if anyone is interested). Preliminary tests this afternoon are promising. Throttle response really good, smooth delivery throughout the range. I'll need to go and live with it for a while, but I am smiling again at the moment. | 
Hybrid Mode
