So. I finally got my 4nine. And in my excitement I totally forgot the fact that I probably need an adjustable 510 pin on whatever topper I use. Which is problematic since it have a kayfun and a tobh sitting on hand right now. kayfun makes connection with o-ring trick, but tobh 510 pin is really really short, so I'm looking for some drippers with adjustable pins or protruding pins. Pics are always great too btw. Thanks