It was running rich up to 5000rpm and then going mega lean after 5000rpm, I was also losing power at random points after above 5000rpm. Dunc really spent some time getting it sorted for me, even after an ECUTEK run was suggesting everything was ok, he continued digging and watching what was going on with my mix on the dyno, and got to the bottom of it. In the end I had to replace the MAF (which sorted the power loss), fuel pump and filter. I replaced the panel filter for good measure while it was there!! The car was up there for about three weeks while I was away on holiday.
His good reputation is thoroughly deserved. I can't recomend him enough.