The 650's & 750's were one of the biggest let downs Gibson ever came up with. The TB+ pups were just not right any way you looked/look at it when installed in these bodies.Prototypes of this body with wood block down the middle or totally hollow just did not make it. Lots of confusion going on what they were actually trying to come up with on these soundwise. I know no one who has one wants to mod them (because of the price they paid) but I think they would be a nice platform to try out a few other pickups.(did I hear some say 3 mudbuckers and 3 baritone switches with phase in and outs..?)no really what ya think..?