RE: Gas Pattern engines.
We have a MVVS 160 petrol which pulls a 12lb Xtra-Wot around with great authority. If you could get it under 11lb (which I think you could) then you would be onto a winner. It was very smooth as well. Turns an APC 16X11 @8800
We are (hopefully) getting the new ZDZ 40 to try as well, although no sign of it yet. Once tried I will post up thoughts/data on here.
A