I don’t think the tail cap lockout will work on the SS or Cu versions. You can’t break the circuit that way. That would be fine for the aluminum version.
Yes, that’s what I have. Sorry, I must have missed that.
Hi BrianK,
Could you use PTFE Plumbing tape on the rear body threads?
Just a thought.
Splott-Light 
I don’t have the problem with it. Mine is anodized alum’, so I just unscrew the tailcap a bit.