I am acquiring second hand a mint Carvin LB75 with J and HB pickups and piezo's. I wanted to know upfront if I can replace the stock pickups with Bartolinis down the road? Will routing be necessary and can I leave in the existing wiring? My luthier friend will do the work. I would be open to other PU suggestions as well. Also, who has the best relationship with Bartolini to get an order filled in this century? My idea is that the Bart's will be the coup de grace, given the premium woods on the guitar. On the other hand, I may not like the guitar and I may sell it, or I might just like the stock setup. Just looking ahead. I know other threads exist on TB, especially re: the HB (e.g. Basslines PU replacement), but I wanted to kill all my stones with one throw.