in msp on the 900 it seems to be 5 on 3 off (3x) and 5 on 2 off (1x) every month, and i usually dont have a problem getting released early for the last flight home, since i have made it pretty clear that i commute. The worst that i have gotten was crew scheduling let me list and get a boarding pass and then call right before i get on the aircraft (in this case they let me go). most of the time if you commute, plan on coming out the day before. I was in mem for awhile and used the late Fedex flights. I left home at 8pm, and got into MEM at 2am, and started reserve at 6am.