As far as I know JR doesn't train OD as a secundary (source: Coach Parrot and Training Simulator)
You´re right. I was quite sure, that I read it in a german forum, but I was mistaken. Sorry my bad.
I also asked some Dutch experienced managers about possible elastics between (high) ID which could speed up OD. When training big men in OD after inside training that effect wasn't noticeable.
I think this depends on the training strategy you´re using. Going first for the straight A-Skills and finish then with B-Skills (AB-principle) or the other way round might make this effect unnoticeable, due to the age of the bigmen or the training order (if OD comes first).
If you go for the ABA strategy, you can take a small (!) advantage to this effect. I have to admitt, that I just talking by a little experience, because I tried this once with my current SF. The results were okey but I have to admitt, that the main factor still might be HA for the OD-elastic-effect. After the skills became even, the OD training became much slower, although the ID was still high enough.
Anyway, it´s really fun to read the comments here. They are very informative. Thanks for all the nice insights.
(y)