Hi,

I just completed a Sig SE. I'm using a TT pro .46 and she weighs in just about 5.5 lbs. The TT seems to pull it around just fine. I think you will have more than enough power with that Saito 72. Do you have taller gear to swing the larger prop that that 4 stroke needs? The stock gear is set pretty low to the ground. I use an 11.5 X 4 prop and it like to trim the grass at the field pretty good.

Good luck, and have fun. The plane for me is a total blast to fly.