I am a little hesitant of this powder (dmt) getting everywhere. Is the regular screen going to keep the powder from falling inside or going into the bag? Do I just use the same process as for weed vaping or do I need some sort of mesh with smaller holes?

EDIT:
Also what temperature to use with this device?

How long to wait for the effect before taking another breath?

Don't have a Volcano, but with the Mighty there's a steel wool pad that you put into the chamber first, then load the spice on top of. If it has one, that's the was forward.