Hi there,   When I screw the heat controller onto a valve that does not need an adapter, the knob pops out of the screw ring. This appears to be by design. If I screw it on less tightly, calibration fails, due to the greater distance between regulator and pusher. Besides, it will just sit loose.   Before I start messing with glue or duckttape, I thought to check in with all the creative minds in this forum. Anyone has any ideas on how to solve this?    (Before