debook, I am mostly (90% +) using 510's on my XH, so I know what you mean. It really would be better for us if there was a brass connector screwed in. Oh well, I doubt it will ever happen because that would probably require a redesign...longer tube, etc, etc. I have 3 510 adapters, 2 for 801 tip and 1 for 901 tip...just in case! I think I may need to get another 901 to 510 adapter!!!
