Vapor, Boyu,...very odd, you guys are starting to scare me a bit. I'm planning on moving away from my quick-fits and go with Koolance on some of my planned builds, but not if this becomes a problem. I have 1 set of 3/8"x 1/2" here and they fit both the v1 and v2 well enough.

This was a bit of a bad angle but you can still see some of the gap between the fittings. I can take a better pic if needed.



My v1 was a bit closer though, but still didn't touch at all.