IIRC, there is/was a fretless MIJ Jazz (JB62FL), that is very close in spec, but has no special Jaco association. Very high and consistent quality. "Rosewood" fingerboard, but hard as ebony.
Then, the next level is the MIA Jaco model, which has received its fair share of negative feedback WRT dead spots, lacking precision in the assembly and manufacturing, soft fingerboard etc.
Top tier is/was the Custom Shop Jaco bass, in some road worn model. Supposedly in a different league compared to the regular MIA model.
Mine are the MIA model and, apart from the QC issues I had, I can definitely say that neither one has the problems you listed. The build quality itself is impeccable and very precise especially the neck/body joint. The fingerboard is Pau Ferro, but has a very hard polyurethane finish on it, making the surface rock hard. It has the usual deadspots that are on all Fender and FSO basses, but I don't find them any more pronounced than on any other Fender or FSO. You should see the dead spots on my CLF L2000; if you worry about Fender dead spots (which I don't because they're normal), the low "C" on the G string will make the hairs on your neck stand on end...
Again that's apart from the manufacturing defects, but that's why you always buy from a place with a good return policy. when you get a good one, it's really good.
The custom shop "relic"ed one, the MIJ with the unlined board and the Squier VM version are different basses altogether.
L
Last edited: