@beyond6strings I was going with the 12-10 as the extra wall thickness would make it a bit stronger.
Mine has a piece of K&S brass tube which is just under 8mm bore.
The glass has a couple of O ring grooves in it so the brass fits properly and it butts up against the back of the tip.
Mine has a piece of K&S brass tube which is just under 8mm bore.
The glass has a couple of O ring grooves in it so the brass fits properly and it butts up against the back of the tip.