Thanks guys! Turns out the vent leaked a little residual fuel when I turned the plane over and it spilled onto the Tygon line making it look like the UAT was leaking. Just to be sure, I pulled the UAT out of the plane gave her another trun with the pliers and no leaks!!
The UAT came used from someone else so I didnt receive any 6mm with it. I might just give Todd at Dreamworks a call and put some 6mm on there anyway. I dont like how I cant get that cap screwed all the way down anyway.

Any advice on where to place the vent? I've heard to loop the vent line around the highest part of the plane and then place the vent on the lower left or right ogf the fuse. Does it have to be run to the outside of the AC? I suppose there would be negative pressure from the engine running but would it be enough to affect fuel flow?

Cheers!!

Chris