No, the XP will not seal to the glass without an adapter. You could push down and get it to work, but the seal would not be air tight. The Auto setting on the XP is located just past the 9 on the dial and is for tobacco. I had a chance to try mine out for a bit last night. It definitely heats up quicker than the old Inhalater. Another thing I noticed was that if I started hitting it too hard the light would start blinking, but if I slowed my draw the light would blink faster and then go solid. With the old Inhalater if the light started blinking while I was hitting it I would have to stop and wait to get it to go back to solid. This seems to indicate that the heating element is much more efficient. I have both Inhalaters on the charger now so when I'm done with work they should both be fully charged and ready for some direct comparison testing.