Certainly the best approach to this is for you to measure the bore sizes yourself, buy the necessary tubing, and then make and lap the slides. Even if I could find statements about the original bore sizes for an instrument like this, I don't think I'd depend on them .
Last edited by ghmerrill; 03-30-2014 at 09:39 AM.
Gary Merrill
Wessex EEb Bass tuba (DW 3XL or 2XL)
Mack Brass Compensating Euph (DE N106, Euph J, J9 euph)
Amati Oval Euph (DE 104, Euph J, J6 euph)
1924 Buescher 3-valve Eb tuba (with std US receiver), Kelly 25
Schiller American Heritage 7B clone bass trombone (DE LB K/K10/112/14 Lexan, Brass Ark MV50R)
1947 Olds "Standard" trombone (Olds #3)