The J-hook thread!

[Caketron]

I can make 18mm joint versions if wanted, and that would be cool, been making these for almost 15 years and I have never made an 18mm one yet!

I think this is the way. @coolbreeze has a point with the convenience of cleaning the reducer

 

[XoGnosis]

got pic posting sorted a trifecta of fresh glass art I concocted!

and that center one has landed in its forever home.
So far I've only used it dry with the tornado and ZX, but it's great that way. the 3 hole perc adds just enough resistance - I think I may prefer it to my traditional, more open j hooks. I'll add additional thoughts once I've had some time to get to know it, but first impression is that it's very nice indeed.