Any way to fix a loose negative post?

[Art Mustel]

Hello everyone! I have an unknown 3 post rba with one of the negative posts loose, meaning that i can't tight the screw on it since it will spin. The post enters in the base by applying pressure, not any visible thread on post or base, and no access either from underneath. Is there any relatively easy way to fix this issue, or should I use it as a single coil atomizer? Thanks!

 

[State O' Flux]

Silver soldering would require a good amount of heat on the build deck, which may overheat the + post insulator, so you'd need to press that out prior to soldering.

Other option is to install it with "conductive, silver metalized epoxy"... shop around, you'll find it, but it might cost you more than the atty did. ;-)