Republic Questions

1) Is it possible to bid between certificates on the same AC? I know there is an equipment lock. I understand the AA flying will be out of ORD. 2)What is the best way to go about getting this? 3)Will FO spots be filled only by newhires like DEN? I have read the other threads. I have read the other threads about QOL. I am educated to the ramifications of this decision.

Thanks