DB, the masking tape idea to prevent the glue from gluing the truss road to the body might be improved on by this tip from my friends at Australian Luthiers. I'm wondering how with squeeze out you would prevent the glue from spilling into the routed slot? They recommend using cellophane tape, trimming the edges close to the routed slot, then spreading glue onto the neck with the cellophane in place. Then wipe the TOP of the fretboard with a slightly damp cloth and apply the fretboard to the neck. You don't remove the cellophane. Dampening the top of the fretboard apparently counteracts any stress put on the underside of the fretboard by the wet glue - otherwise the fretboard being wood will do what wood does and will try and 'curl'. Well that's the theory anyway!