I own a japanese fernandes with active pickups that thumps but it weighs a ton and hard for my back back. I own a Electra pbass that is perfect in every way but the bad pickups. Can a passive bass be modified to active pups or is this a no-no in the bass world??? And also, does size really matter in deep sound and thump? Cause i see people with these fenders who have the typical fender bridge and the basses thump. wish i had $1k+ to spend on one.