so far the servos i have are doin the trick.... as for the engine... it was a tartan 4 in it before.... so i am probably goin to grab one up.....as for a trainer... i dont think it is....its totally bi-plane....have you seen any pics of mine? if not msg me in msn and i'll send ya some pics of her...or look into bucketobolts post... gpchristen eagle... i have all the pics in there......