In spite of minor deficiencies, it is a very good book. It is packed with useful information, and it gets more interesting to read as I go along.
My models are much smaller and simpler, but I might try his ailerons that control yaw by inducing drag. The Wright brothers tried no rudder and then (after they discovered the spin) coupling the rudder to the ailerons, but they settled on separate controls. But I think the reason had to do with angular momentum, which is much less of an issue with models than with slow flying piloted aircraft. For a trainer, it should be almost perfect, if I can do it without too much effort.