I happily use(d) 10/47 at concert on
(1) My Bjarton (Hagstrom) BJ12E - I felt nervous with 11s on it in concert
(2) An utterly disgusting old Framus held together mostly with bolts and a home-made bridge doctor
(3) A modern Yamaha which is fine with the 10s but went a bit banana-shaped when the previous owner put 13s (on a 12- he had hands like tyre fitting machinery!) on it
(4) A punt paddle that is so bad I don't even take it camping, and won't until I have figured out how to sort its action - a neck set would be good, but way too much money for that heap of junk.