markbass,
i was thinking about converting mine into MM/P Bart combo, but discovered that the J pup hole is 97mm long. MM pups (Bartolini's MMC at least) are 101mm long, and have one srcew mounting "ear" at the bottom / south, and two "ears" at the top / north side.
well, the the bottom is not that much of a problem, except the nice rounded "ear" would end up in a square hole, bit too big for my taste, and the top of the J hole would be just between two top mounts.
i did the test run on a piece of scrap wood, and it looks plain ugly, the gap is too big to be seen on a Warwick!
if you decide to go with Barts i would suggest one of the soapbars - BC (32x100 mm), wider BD (36x100mm), or M4 (38x102mm), last being of a EMG 40 shape. they're all square, big and great sounding pups.
tha other option would be filling the J hole with something like epoxy / wood sawdust mix, and rerouting it for MMs. in that case youd have to give up natural finish, which i think would be a shame.
the wood on your new baby looks much better than what i've found when i've stripped my streamer, and IMHO would look better with just a clear or slightly stained finish. walnut, maybe? would be pitty not to be able to see that flame figure...
just my two cents ,
have fun,
zoran