Custom Epiphone Expert- 6 String Bass w/Factory Mods ?

Up for sale I have a rare Epiphone Expert 6 bass with a special history. The following is info about the model I got from epiphonewiki.com:

Introduced in 1996, the Expert-6 was the bass counterpart to the Epiphone EM-Series guitars and the 6-string, neck-thru version of the EBM bass. The active electronics are rumoured to be a prototype that never went in to full production.
It is also rumored that there was an American-made version of this bass. However, the closest thing to confirmation of a USA model was an Expert-6 that was sent to Gibson Nashville before final delivery to be routed and fitted with EMG humbuckers.
The Expert-6 was produced at the Samick plant in Korea, allegedly between 1996-1998. Although the Expert-6 is listed in the Epiphone 1998 specification sheet, the only year that has ever surfaced on the used-market is the 1996 model.

1996
Body:
Swamp Ash body
Patented "Swept-C" shape
Neck-through design
Neck:
3-piece quartersawn maple neck
Rosewood fingerboard with offset "dot" inlays
34" scale
2.05" nut
ELectronics:
2 Single coil active jazz pickups
1 Vol. 1 Tone, 1 Blend, 1 Boost controls
Hardware:
Black hardware
4x2 die-cast tuners
Pearloid truss rod cover
Recessed input jack
Black barrel knobs
Colors:
Natural (NA)


OK, so here's where things get interesting. I have every reason to believe this is, in fact, the bass that was factory modified at Gibson Nashville. Here's what I know: I purchased this bass on Ebay from a man named Dan Schafer, who is a Nashville recording artist who's played with a number of acts including Shania Twain. His ebay listing explained that during his tenure with Jack Greene on the Grand Ole Opry, he was in need of a six string bass. He claimed that he went to the Gibson factory in Nashville and played a number of Expert 6 basses before choosing this one. He then had the factory route and replace the pickups and electronics. He also claimed that this bass was in fact used on the Opry, but I cannot find any images or video to support the claim. Though the wiki page says the mystery bass was fitted with EMG's, I received this bass equipped with Bassline humbuckers and a Bassline 3 band active preamp with a push/pull control on the volume pot to engage what Baselines calls the "Slap"contour. This is the information I have, I have not contacted Dan nor Gibson to verify any of this. When I received the bass I realised that the neck pickup was not working, so I want ahead and replaced both pickups with a new pair of Bassline humbuckers (around $200 at the time).

Regardless of the validity of the story, this bass plays and sounds great. The bass is in excellent condition, a few minor dings hear and there, but the bass is over 20 years old. The only other thing I should mention is that the D string tuner must have gotten bent at some point before I owned it, because it turns a little harder that the rest. It is still fully functional and never really gave me any trouble, so I never replaced it. This bass deserves to be played and, sadly, it just sits in it's case right now. Includes case in picture and Schaller strap locks.