I was also looking at the same problem. I flew from LSZH to LIMF, got promoted, so wanted to fly a bigger plane on Class 2, but I dont want to do it because my B1900 will be stranded in LIMF then.
I think we should have a policy in place, where we have a rule which says that, you can fly a good flight around various airports, but the plane should be returned to the hub before you try and fly some other plane either due to promotion. Ofcourse you can leave it back, if you are acting like a ferry pilot, to bring planes to particular airports ....
Thats my view, so I am going to fly my B1900 back to LSZH and then go on to a higher plane, than leave my plane lying in LIMF, unless I have ferry pilots.
The main policy I feel is that that EHM should encourage pilots to fly a clean league, where the flight started from a particular airport/HUB should be returned back before flying anew ...
what say??