Originally Posted by Rman12321
they don't make that wheel for the ATK 300 anymore apparently, and Ibanez said it was impossible to get one according to the shop.
If the Truss rod is threaded. Then there is no reason that you/ they could not find some sort of nut that would fit onto the the rod that would make it operable.
No, it may not be the same. But, the issue here is function over form. Even soldering on a hex nut, to allow you to adjust the rod with a wrench would be enough. You may have to remove the neck to do it. But at least it makes for a functional TR and potentially a sellable instrument.
Depending on your level of frustration and dissatisfaction. I would probably say take the cash, hand them the bass and walk away.
If nothing else, it will probably sit in the shop for a LONG time. And every time the shop owner or tech looks at it, they will have the memory of completely screwing up an instrument and losing a customer due to complete incompetence.