BahamasAir,

I have some ball links you could use on the pushrods which will tighten up the control surfaces. This will help avoid the dreaded flutter. And give you a more solid feel to the sticks.

And you can fly at less than full throttle. At least so I am told. I've done it once or twice.

I think it is a clean plane and should be able to handle the 55. Engine invereted of course so you don't have to carve up the cowl too much.