PointMagu,

The Saito 180 is towards the low end for the recommended engines for this plane and probably give you marginal vertical performance. The plane would do much better with a Moki 1.80, 2.10 or one of the new light weight gas engines. I will let someone else can give you a recommendation for a gas engine since the only one I have is a 3w60 and I am not familiar with the Brillelli or other similar engines. Keep us posted with your decision.