With many regionals in the 2 year upgrade range (Skywest, Pinnacle, ExpressJet, Republic...), upgrade minimums seem like they are becoming more of a barrier to upgrades, more so than seniority. I was wondering if anyone can share the upgrade minimums for any of the regionals, especially the ones above.

Pinnacle, according to APC:
upgrade mins are 3500 or 3000 with 500 in type at Pinnacle

Thanks guys and gals.
Ryan