Hello, i have posted before about strings, now i moved into another problem of my cheap hofner bass: neck dive.

It's a very bad back bow, every high note(probably starts from fret 11) in every string, when i play it caused crazy fret buzz, even some of the low notes buzzes too.
I brought the bass to a music store but they said they can't repair it because the truss rod won't work on a glued neck bass like i have, the only solution is to re-attach the neck.

Was it true??
every single reply aprreciated. Thx
