RE: 4-channel trainer
If you''ll look at ARF them maybe the Multiplex MiniMag which I had and flew for a few months after the SC or possibly their Gemini although that is another step up and would depend on how confident you are.
I''ve also just flown someone''s T 28 an hour ago which a lot or people recommend and could be a good alternative as it''s quite tame. Personally I prefer the MiniMag as I think it''ll be more durable than the T 28 and whilst the throws could obviously be increased and the CofG moved back even on high rates I was struggling to get the T 28 to role at all although initially that''s what would help make it a good aileron trainer !!!!!