Went back to the school that keeps on giving. And, It gave some more. About 20 minutes into an hour and a half hunt I got a solid 91 vdi, high tone, at 6 inches. I knew exactly what that was! But was surprised that it wasn't. Usually dig a silver ring when the vdi hits 91, but this was just as good, even better considering I didn't have one of these. Griding this school and hitting it hard is paying off.