Very few produce their own tubes. Cuetec, Pred, Whyte/Viking, BeCue i know for sure make their own. Most cf shaft sellers buys from a supplier and then complete the shaft so there's really not a lot of difference in most of them. I've A-B'd the Rhino against Pred, CT, McD,Meucci and the early BeCue Prime and i honestly can not tell much difference in any of them. Subtle differences in sound/feel/squirt for sure but nothing big. Definitely don't see the $300(and up) price differences when it comes to actually using one. The fact(?) that one may/may not be a tad dirtier to use is not going be a deal breaker for me.