Good to hear that the shielding paint is doing it's job.

I just had both the Explorers opened up on the weekend whilst rewiring the Bass and took the opportunity to snail tape the control cavities as an extra precaution as the 6 stringer did have a small amount of buzzing that was only heard when playing through headphones via the amp. Didn't bother with the PUP cavities as the paint was doing it's job there and from the single coil builds I found that most of their noise was coming from under the control plate too.