So after some successful builds I screwed up when I wanted to glue the fretboard onto the neck. Since I'm nervous about that topic in general I want to discuss this topic with you guys and rethink my procedure. Normally I radius sand and fret a fingerboard and glue that to the neck. That always went well, but I doubt it's the best way to do this? Now I wanted to "pre-readius" the board, glue it on and then do the final radius sanding to guarantee a perfect level surface. I clamped the board down just as always (or even better) and thought nothing could go wrong. After I tightened all the clamps and wiped off some of the squeeze-out I saw there's a small slit between the board and the neck down the WHOLE neck an BOTH sides??? I only placed one row of clamps pushing the center of board to the neck. Now I assume there hasn't been enough pressure on the sides of the board or/and the glue (Titebond) made the board bend up??? I think the fretted boards I usually clamped down that way are stiffer and the frets transfer the pressure to the sides as well. So I see two options now: Do it as always again, or clamp the board down without any radius. When doing the second option I was wondering how do you guys radius the board when it's already on the neck? Question one: Poll. Question two: how do you radius sand a fretboard that's already glued onto the neck.