For the longest time I've thought about installing a T-nut style system before you put the fretboard on. So you'd have the pressure pulling down over a wider surface area between the fretboard and the neck. What I really wanted to do was to build something that looked like a little "coffee table" where you had a table top, and four "legs" The legs would be cyllinders and be threaded inside. It would go under the fretboard and then you'd have about 5 square inches of even downward pressure. The Maxxas used two T-nuts with two screws, and believe it or not, Westone had the threaded inserts with flat "pancake" topped bolts. I've seen everything for sale in woodworker's supply, including the Westone style system. The problem I would have is the same as the Seagulls and other acoustics that use that method sideways. If the threaded insert pulls a little, now you're just tightening the bolt against the insert. In other words, there have been some Seagulls where you could get a business card through the neck area even though the bolts were tight. So long as your inserts are 1/16" recessed everything should be fine and I love the idea. BTW what you don't want are T-nuts, because you can't install them, or the "expanding style" inserts. Those are usually fluted and knurled, and when you put the bolt in they expand to hold their place.