ORIGINAL: drdoom
My JetCat came with a Small piece of tube that you just incert into the top of the can. You have to PULL it back out when you are ready to disconnect.
It works, But the trigger was cool.
"Pull" is the operative word here. I also fill by onboard tank for my P70 in the same manner. You really do have to pull to get the insert fitting out. I thought I had a problem but I guess it's common.