Also we have found on some tubas use of the shank actually improves response, even if not required to correct shank size. In our own range we have found that with both the Luzern and Excelsior.
Now available from Wessex Tubas in USA and UK
USA - http://www.wessex-tubas.com/product/tub ... e-adaptor/
UK - http://www.wessex-tubas.co.uk/product/t ... e-adaptor/
