Use Magic Device while on DM Quests

[Eight-Bit]

I can say from personal experience that I have rolled -every- single possible check I have, even Gather Information and Parry, on a DM quest except for Use Magic Device. Because of this I was wondering what the extent of the ability is? Can a Rogue swap a UMD roll for Spellcraft?
  It's kind of open-ended, butI would like to make use of those ranks I keep pouring into it.

[Leanthar]

I think you do make use of them by being able to use items that your character would not be able to use (IE things only meant for casters). But yes, I would think from time to time you could use umd checks on a quest--but that is up to each GM and what is happening. I personally think UMD should NOT replace spellcraft checks, your character is not a caster after all--I know I would not allow it to happen.