I'll add that since my last flight with the SE5a I did a lot of "rudder" practice with the Puppeteer. I'd fly it almost as if it were a 3-channel model and was surprised that ailerons aren't all that necessary. You have to think ahead a bit more and allow for more time, for example, to level the wings after a turn. You also get used to the different way that the model responds to right rudder vs. left rudder (on the Puppeteer, left rudder also caused it to dive left) while right rudder would mostly just scoot the tail around to the right.