Heyo!
Thanks to my bizarre and wonderful job I was able to nab a "final prototype" loaded JMJ mustang bass body. When it arrived I put our 82 musicamster neck on it.
It's fuckin great, man. Sounds better than your standard mustang bass, and the relic job, which I generally disapprove of, makes the bass feel nice and worn in. Guessing from Rob's reaction on twitter, I think he disapproves.