I have yet to buy, so have found this thread incredibly informative. and thank all previous posters for the information share.
I have been heading towards the tib 8.1, I am used to air pistols (webley hurricane and tempest) so the larger mag in the handle looks more the similar size. but am having to make a choice so far without having actually felt/held either. I too am put off the TiPX because its plastic, but again based solely on lack of feel. So I am currently looking more at the 8.1,
However, location of the co2 is not a factor in my decision making, more the comfort of the marker in my hand. not worried about hooking up to airline etc..
But I would like to know a little more about "o" rings, and lubing the respective markers, best lubes to use (I again appreciate this is a personal view more than 100% this is better than that)..
I have been offered a brand new tib 8.1 socom for a very similar price to the TiPX only.. so costs are less of an issue. (I know the extra mags cost more, etc)..