I purchased a used Gibson new century explorer. I know very little about the guitar other than it has a carbon fiber face and gibson 496r and 500t pickups. I play hard rock and metal and the pickups sound good but I would love to hear the new SD Gus G pickups in it. The only problem is that If I use active pickups I have to take off the entire faceplate to replace the battery which is a really big hassle. I don't want to route a battery compartment out and ruin the integrity of the guitar. I heard that there are other external ways to power active pickups. Is this true? If so how? And I was also wondering if PU covers would work well or if they would take away from the tone of the PU?