I just added it up and I have flown/own 9 different versions,sizes, manufactures, etc of Se5's and se5a's. And several of most of the manufactures. All flew well, some VERY well. Some required tweaking. All of thes planes pull to left because of engine torque and benefit in varying degrees with some right thrust. But i normall set my own up o-o, and don't have issues.
I agree with Art, and what i recommend to many new to WW1 flying is just fly the airplane. If it needs right trim, mecanically put some in and fly it, keep making changes until you get it right. It will probably respond beter with right rudder than right aileron. We fly these mainly on the rudder, with aileron to correct/help the rudder. learn to use your left thumb. Set up aileron differential, more up than down. Most of WW1 birds have very little down aileron.
But, also like Art said. It's hard to recommend this far away and without being able to fly the bird.
Makr sure you have no left thrust in the engine...
above are random thoughts, obviously
SE5a are the greatest
steve p
www.hoosierdawnpatrol.com