OK. Wait. Just re-read the whole thread!
Bolt on neck that goes up like a ramp at the 18th or therabouts?
It would still be deformation and yeah, planing the fretboard would fix that.
This is where I ask you to try and take an awkward photo of the side of the fretboard down from the nut so I can get a better idea.
Depth of field is my enemy, but this shot shows the ski jump.
I've been playing with the truss rod and bridge height to try to sort it out, but I can't work around the fundamental problem. The truss rod doesn't do anything to the bolt-on section
This is where you get to decide how far down the hole you want to go.
How would I fix it? I would yank the frets, de-tension the truss rod, sand it flat with a radius block and refret.
It's detailed, but not difficult work and the bound fretboard does complicate things. You will need a radius sanding block, a fret saw, fret wire of your preferred size, tang nipper, a small soft faced hammer and a selection of files, some of which you will be modifying with a belt sander and grinder.
I have all the tools and a dozen refret jobs under my belt so I don't think twice about jumping in and doing it. Purchasing all the bits would be about the same price or more as paying a local luthier to do it for you.
I’m not sure we have a local luthier. My guitar teacher got all excited when I brought the Framus in to a lesson and he heard I’d been working on it, because he needs a guy.
And this will be interesting. It’ll give me a chance to do a better job on the binding and the frets are not new. So after Christmas, it’s time to start looking into this!