I'm always split on stuff like this. I know there are systems differences (engines, controls, etc.) and other quirks (CG shifting backwards as fuel burns in the 33 and 35 models) that would warrant some time in the various models, but really, a few hours pouring over the manuals with someone that knows the model and a couple flights should really do it when transitioning between the different models. Like I told you, I've only flown the two Debs, but I doubt I'd feel there was too much difference in handling the different models.
