Ken or any of the other gentleman,
How many corner-less double basses have you seen in your careers? I've only seen two. One being Fernando Grillo's instrument at a lesson in Italy and the second being my colleague Matt Hare's italian bass (maker unknown). Is Grillo's bass authenticated as Rogeri or is it attributed ? That Storioni looks and probably sounds like a tank
... Ken are you doing anything about the long string length as far as shortening it.