I've been using Schaller strap locks on my instruments for a long time, and I've had exactly 2 failures; both times a mounting screw broke *just* below the wood surface. Both times required reverse drilling to get the screw remnant out, then plugging the hole & drilling for the new screw.
Once...
Excellent work on the refret; I wish everybody took the time to do it right.
On collectability (is that a word) versus playability: most Stradivarius violins that are being played in public today have had major work done to them. No refrets, of course, but things like having the neck and...