Hi Awake
North Carolina - I worked in Greenville for a period and frequently needed to drive through NC - happy memories!
I have been using the Wanner Swiss made oil gun. The leaks occur at all the "seals". The top cap, which is easy to sort if the gun is kept vertical, the lower cap which is more difficult to fix and the seal on the plunger. When I have a moment I will make a real effort to tighten the threads and maybe use a thread sealant. My next step would be a rebuild. BUT BUT BUT why are these oil guns so bad and so far, on this forum, nobody has suggested a oil gun which works and doesn't leak.
Very frustrating
Mike