Re: Adding pickup covers to humbuckers. Potting and soldering questions.
It does not need to be potted, whether again or for the first time. What is very helpful is taking double-sided tape and putting it under the cover where the slug coil is, then using a good clamp to hold the cover on as tight as you can while you solder it. That's the approach I use and I only use unpotted pickups. I have to work to make them squeal. Very stable up to Van Halen levels of gain.