...FishPart, I have thought about something like that....
...my concern was the size of the head of the screw. The closer I can keep the sole down the better. Check the diagram to see what I mean. If I went with the screw, I would think that the area where the screw was inserted wouldn't have as much of good seal as it would if I used the nail. (It wouldn't sit as good). I've thought about maybe 'boring' out the area on the sole where the screw would go, just so that it fit more snugly, but why ??...If I can probably just use a nail....
...I know the screw would eventually make a home in the sole, but would it effect the application at the time, not allowing the sole to completely rest on the wader due to the size of the head?
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...if you can understand that....