So I need some plastic syringe tips to fill my kayfun 3.1 style tanks. I got some of the green, 18 gauge tips, however I seem to need something a bit smaller, as they aren't engaging the ball valve, no matter what angle I try. I heard I should try the pink, 20 gauge size but I'm having some issues tracking them down. Any ideas on where to get these? Also, while I do have syringes, I would like a bottle that can use these tips for filling on the road.