Folks, A bad shim and a reckless owner led to the bass developing a ramp at the neck. Any ideas as to how a ramp in the neck can be removed? Picture for representation only (Courtesy: Haze guitars). Thank you!
Don't worry about the back, worry about the front. when the front is right (the frets are the same height in that area) the back can be shimmed, or shaved as required. I think that bow is naturally occurring, not a result of something any previous owner did or didn't do.
A twist can actually improve the neck. If the twist makes the E string higher than the G string, it can be MORE comfortable to play. There are also ways to untwist a twisted neck. Your major problem is the truss rod. Get it fixed and the rest can be dealt with.
The photo is misleading. It seems to show that the heel has bent, supposedly because if a shim. But that’s because the straightedge is being held flat against the back of the neck. If it were being held flat against the heel of the Neck it would reveal where the bend is actually occurring - just before the heel around the 17th fret. Some folks have had success by heat treating a neck with that condition. Check warpedneck.com
I tried heating it, but the ramp will not go away. Additionally, the neck pocket was too deep. I shimmed it with a credit card and a business card to make the bass playable 1/32". But!!! It was a dumpster find and I played it at church the other day. The only problem is the consistent fret buzz across fret 14.