I had an exceptional student once and he used some of his 'spare' 10 hours to do most of the R44 type rating course whilst on the ab-initio PPL course on the R22. I think he did his R44 type rating test as soon as he physically got hold of his license.
Most normal mortals (myself included) are sufficiently challenged by the basic course that they have no spare capacity for this sort of thing.
With those two types, I would have thought that the throttle is the thing that will bother you. The 22 will make you lazy with throttle management -maybe fly it without the governor as we used to (before I get flamed - that was meant to be a joke) ! The other thing of course is that whilst I'm sure your S300 instructor is encouraging you to fly smoothly, that machine can absorb a lot more agricultural handling than the 22. The exception to that is the landings though, where the S300 can teach you more than you need to know about ground resonance.
It can't do any harm to try it though, if you and your instructors are comfortable that it's not hindering your progress then why not ?
PS. My exceptional student was a digger driver in his day job, so it was second nature to him to have each limb under separate command. I had a similar experience teaching a drummer, and I'm waiting for a church organist to come and learn to fly so I can prove my theory completely.
Last edited by puntosaurus; 14th January 2012 at 08:49.