P40luvr,

What you need to do is mechanically trim each of your models for straight and level flight with the trim sliders centered. This way when you switch models you only have to make sure the trims are centered and adjust the engine idle with the throtle trim. I did this for years without a problem. Yes computer radios make running multiple models much eaisier. But it is not impossible or overly difficult to do this on a radio that doesn't have a multiple model memory