Mars;
You have built a fine looking AC, and I know from experiance that once balanced it will be a STELLAR Performer... BUT; allow me to give you some advice . . .

Given the engine that you have mounted . . . you have MORE THAN ENOUGH POWER for that airframe . . .

I have built, flown and lost three Speedy Bees that I had powered with an OS .20 (I learn my lessons slowly)

The first Speedy Bee had the wing separate from the Fuse when the Elastic retainer snapped (1/8" dowel), the other two planes had the Horizontal Stab break in flight (Flutter due to excessive speed & stress).

My advice to you is to not exceed 1/2 throttle or to change the engine to a .15 .

Keep in mind that Andy Clancy designed this plane for electrics and Glow engines are a whole lot more powerful!!

Happy New Year!