The customers wanted to replace active EMG pickups with a set of passive Aguilars. The emg's were used with an Aguilar OB-3 onboard preamp, which was kept. Going from active pickups to passive pickups changes things, even if you're using a preamp. For one, the bridge now needs to be grounded. Problem, this guitar wasn't even drilled for a ground wire. So right off the bat, we've gone from changing a set up pickups to drilling 4 inches into the guitar.
Next, the volume pot was replaced with the correct pot value for passive pickups. The push-pull pot that controlled the mids and switched between 400k and 800k was replaced with a standard pot to only attenuate 400k as requested. The cavity was also shielded with copper tape, the bridge was replaced with a Schaller, and it was setup with D'addario Chromes.