Hey there folks,
i think i have it somewhat resolved, in that i completely changed the wiring and components i had in that guitar. I removed all the old parts except for the selector switch and put in a RS Guitarworks Modern Upgrade Kit and now it definitely feels better!
The parts i had installed before where not necessarily bad, they were also CTS pots and good capacitors, but i had some funky wiring with a push/pull pot activating a special inductor that would change the behaviour of the tone pot to filter out mids rather than highs and stuff like that, and i think that this might have put too much of a load on the pickups..
The Nailbomb STILL DOES sound somewhat compressed though, given that it is a fairly high output model.. I am currently thinking about swapping it out for a VHII, as i hope that this would make my guitar more dynamic, and i am going away from very high gain sounds right now.. It is a killer pickup for that application though! :)
All in all, i don't think it has something to do with shielding or no shielding, if a pickup sounds too compressed. At least i don't understand why electrically?
I don't have shielded cavities btw.
Well, back to work now, earn some more money, buy some more BKPs! :D
Take care,
shagga