It's time to get back to work in the real world. Here is a Mosrite body, almost completely recovered from its brush with water-based polyurethane. Stick with oil-based, water-based is junk.
This one went through a long and torturous build process over almost two years. All I can say is don't believe the "advice" you find on talk_ass. However, in the end, it turned out to be a pretty nice instrument.
This is a Martin-style single-acting truss rod. I built it years ago and never used it, and at this point, I never will. I am breaking it up for parts, so I thought I'd post a picture first. It consists of a 10-32 threaded rod in an aluminum channel. At the fixed end, at the lower left, the rod is set in a T-nut and the end is peened (hammered) over to keep it from rotating. The adjusting end is nothing more than a washer between the nut and the channel. Both ends are secured by bending the channel over them, then the center of the channel is cut down and everything is ground to minimal dimensions. You can find detailed directions online.