The TT61 will be plenty of power. Try to install the engine as late as possible during the assembly to ensure the the CG is correct without having to add any weight.

Mine was built from a kit. The building took a week. I was almost disappointed because I had planned to build it a lot longer!

I put the Saito 100 in mine as far backward as possible. The only thing I had to adjust was the receiver battery placement. Now it is beside the fuel tank.

Make it as light as possible and you will get the sweetest flier.

--kaboomski;