What's Nitro, I know what you are saying with the support bearing there, but where do you get bearing that size? I have never seen any such bearing.
Sike, I have not bought the motor yet, as I was unsure of which one to get, the HK, or the S model 4035. This flex issue really bothers me as well.
The perfect solution would be a high pole inrunner (12 pole or more), with a large hollow shaft with some sort of outer spline on it to connect to a gearbox (center diff), and one of the output shafts feed through the motor like this. That way, there is no flex issues, you have the cooling of an OUTER stator, the efficiency of an inrunner, and the the motor can be sealed. That is what I would like to see in R/C in the near future... no worrying about gear meshing either.
It's nice to see so much enthusiasm for this.
redshift, I don't understand what you mean by your idea of 'live axle' and no diff. If you mean just an outrunner in the place of a standard motor/diff, then that has been done before.
I think the first time when I had the outrunner idea was back in '05 or something, and I was thinking one motor per wheel, no diffs at all, just 2 smaller outrunners placed at each differential location front and rear. THAT would be the ultimate, but we are years away from that kind of thing.