I bought a neck for cheap that had way too much forward bow, and this is without string tension.
Here is how I straightened it, using a wood clamp
I removed the truss rod nut, lubed it with molybdenum grease, and tightened it back on the rod, with the neck in a backbow
Here is the neck now at rest. It is almost perfectly straight, I will leave it like this and see if it shifts back. If it does I will have to use heat
