I did do a search and clicked on a couple of links that looked as if they might address this but I just got an error saying the page wasn't found. Anyway, I now have 3 SG Standards, Gibsons. 2016, 2005 and 1999. All three had the same pickup config in them with the 498T/490R. Only the 2016 has the PCB in it. I noticed right away that, although the 2016 sounds great, it doesn't have as much output as the other two guitars despite having the same pickups and the pups are set at the same height etc. The older guitars really rock - put it it this way, the 2005 with the bridge pickup volume knob on the 3 position is still hotter than the 2016 on 10. The 2016 is very sensitive to the volume control, it really does affect the gain BUT on full on it still doesn't have that much power. ANd, on top of that, it actually seems to feed back as if the pickup is microphonic. To address this I bought an Angus Young pickup and put that in. It's a great pup, like a 498T on steroids, BUT, it's still not as hot as the other two guitars and still, when turned up to 10, has that weird little microphonic thing going on. I've messed around with the pickups and wiring in all three of these guitars, but in the end it comes down to a simple fact: the 2016 sounds neutered in comparison to the others. It's as if there's a limit on how much gain you can get. So is it the PCB that's causing it? Or something else? I love playing the 2016 and it sounds perfect for AC/DC cos it has just the right amount of gain for that Angus sound but....it irritates me that something is clearly not right here!