Well, I overpower everything. I have a ST .90 in a .40size Wm P-51. Last year I looked over the Great planes, Kyosho. Lanier and a couple others. i was going to go with Great Planes but I ended up with another project. Consider the GP and throw a .60-90 in it sideways with a Pitts underneath. Get a good set of Robart mechanicals since they have a 3/16 strut.