I’d love to tackle it, if you don’t mind me having the neck for a while. I’m backlogged on builds at the moment and would struggle to find space to setup my makeshift heat station.No one that I know of offers the service around here. There is a device clamped to the neck that heats the neck to around 150 degrees for an hour or thereabouts while the neck is clamped into a back bow with the truss rod barely engaged. It’s the only method I’ve heard of to save a neck that has a maxed out truss rod.
I’ve heated out a twist in a T-40 neck before. The neck was still toast in the end. The neck was separating at the bilaminate seam, at both ends, when I received it. I still plan to get that neck working again someday.