I have a bunch of 4 day trips coming up, all of which are garbage. I noticed that scheduling typically takes similar crappy 4 day trips in open time and breaks them into nice manageable 2 day trips before assigning them to reserves. Is there a window of time where I could capitalize on this and swap with the pot and trade those nice 2 day trips with my garbage 4 day trip? I know if I was WSing I'd get priority on those trips, but my guess is with the way PCS swap with the pot works, they break them up between runs and I'd likely never got an opportunity to swap since they fill them with reserves before the 12pm PCS run.

Is my thought on this correct or is there a way to break into these nice and convenient 2 dayers?