Ron,
I got mine Stearman on Saturday also. I got the wings together, and I'm going to mount the engine next. I've opted for an OS 160 Twin I have had for a while. Fits perfectly in the cowl without sticking out. I am also going with two servos in the lower wing and slave the upper ones to them. I' ll probably use Hitec 625s.
I found one problem with the ailerons. All the hinge slots were 1/16 off center. This is easy to correct by moving the slots. I like the size of this plane as it will fit in my van without taking it apart.
The OS 160 requires a box for moving it forward. I will put a 3000 mah 6 volt battery pak in the box. This is the first plane I ever built where the mnfr. says to add nose weight (18 oz). The big battery should help, and maybe I'll install on board glow with a big battery pak also. Might as well make the weight carry its share!

Let me know how you are doing.

Bob S