TP555 gasblock and FF tube question

[snipecatcher]

I just sent my Form 1 off a few days ago, so if everything goes as planned, I will be ordering a 10" barrel from Paladin Machine sometime in January. I am really liking the idea of using a YHM lightweight FF tube, in Specter length. This should put just a small bit of barrel sticking out past the tube. My question is this: Will I be able to get to the adjustments on the gas block easily with some minor cutting of the FF tube? Also, does the gas block use a standard thread pattern for the adjustment screw, so that I can get a longer screw that will stick out past the tube if need be?
Regards,
-Dan