If truly only 2 months old, contact the factory and ask for a replacement counterweight rod with threads slightly reduced in OD.? Stop putting time into this...it was not made right.? The correctly made shafts and bore holes go into each other with hand tightening.??
I did clean out the female threads with some nitro-solvent (gun bore cleaner), then lubed with a light coating of gun oil.?
No change as yet. I see from the comments I want to more closely inspect the threads, and try some additional cleanings, and perhaps some of the other steps mentioned.?
Thankfully it is still functional, goes deep enough that it is in safely/solidly.? I'm going to take my time trying a few of your suggestions first. Since I got the mount less than 2 months ago, I'm still too excited to use it/learn it to consider sending it in for service!
Thanks to all,? I can see this is a great community and I look forward to participating in it!