Red B

7.5 lbs is easily achevable with this model. If you really work at it I reckon you could get it below 7 lbs.

Engine choice both the ASP91 and the OS91FX have about the same power .... plenty for 3D but not enough for pattern. Hence my choice for a YS110. The only time the lack of power shows up is at the top of a long vertical upline with a square top and downwind loops in the wind.

I thought of the saito as well but from what I can gleen has about the same power as the 2 stoke 90's. If you do decide to go for the MVVS definately put a pipe on it and it might just give you enough. If you do go for the Saito I will be very interested to know what sort of static pull it has?

I will measure my cowl but from memory firewall to face of cowl was around 125mm so the saito should just fit.

Good choice and I know you will enjoy this model as I have been.