I like the truss rod with some adhesive sticking the main tension bar to the sides of the neck, this way the tension is more evenly distributed along the neck rather than focused in one spot pushing against the fretboard.
I glued the fingerboard on, I put a 8 mm strip of tape along the trussrod to stop glue getting in, spread the glue on, then removed the tape, like it advises on the Stew Mac site. I used way more clamps than I needed
My theory is that increasing pressure has a bell shaped curve of benefits, you need enough pressure to make the surfaces adhere, but too much and wood fibres are going to compress, and that's not good. I cringe when I see clamps directly on a fretboard itself. I worry that will put crater like compressions in the wood. I used a caul with high density rubber. I tensioned the clamps so the rubber compresses evenly along the caul. This way I get an idea of how much tension is on the fretboard. Enough to make the join ooze goo.
This guitar is an experiment, if the fingerboard falls off I will know I was wrong