natho6026961 said..
There's a red plastic nut that holds secures the valve into the LE. I've had this unscrew a bit by itself that has made it near impossible to seat the cap. I found that, by screwing in the red nut a bit, more black thread is exposed and it's much easier to screw the cap down. Not a big fan of the system tbh but the high flow valve makes inflation quick and easy (as long as you remember to take the fitting!)
Yes mine was like this to start, I got a couple more turns on the locking ring.