Below 2000 rpm the turbo drops out, then its all down to engine grunt, which is not a lot, so will start to get sluggish, or even snatch, just drop that gear and get the revs up......had mine for years, just adjusting your driving style. That said, on a flat road, mine is happy at 60MPH, in 6th gear on a light throttle down to 1500 RPM. Once the gears dropped, and those revs go up, mine will fly...............Cheers Qube O.
Couple of folk have had theirs re-mapped, that seems to make a difference........