Here is a little spin on it.......... if you want to 'cross train'........... use the same gun. If you are shooting a G35, you can do that easily..... but no matter which model, you've got the option. Shoot Limited Minor, etc......... that may be the most helpful.
I 'division AND gun switched' all last season........ and it did not help my shooting at all. My only New Year Resolution this year was to shoot one division all year and see how it goes. I decided to shoot my Open gun, and leave the plastic on the shelf for a while.
I felt like, as Merlin said, "Jack of all trades, and Master of none". Oh, one other thing--- make sure you are having FUN. If not, re-evaluate.
-Mike