Thanks for the input. I did read Dick Petit's article but wanted some different opinions as well (I will just leave it at that). The Moki 1.8 does sound like overkill for the Stearman. I was thinking either an O.S. 1.08 or a Saito 1.50 both in my shop needing a new home. I did hear someone else mention there were reports of the slaved upper aileron not working correctly or binding or something like that if assembled per the instructions. Personally, I would rather build it that way too and avoid the upper aileron servos for a more scale like appearance and no wires running out the center section of the top wing in to the fuse. Hopefully GP will address that issue soon if they haven't already.