I have a 1927 conn double bell euph, which I just had serviced to get cleaned, dents removed and solder work done. It appears that this horn is in low pitch. I have found that I can play reasonably well in tune if I pull the slides out and tune the open horn down a half step to A. This makes reading music a little problematic, as I sometimes forget and revert back to Bb fingerings. I was wondering if there are other suggestions for playing this instrument with modern tuning. I'm using a Schilke 51D small shank mouthpiece. I know this is a bit large, but it's what I have. The mouthpiece also sticks out of the receiver about 1/4" more than on modern instruments. It's similar to my olds trombone receiver. The repair shop advised against shortening the horn, since it's in pretty good shape all around. Can I get my mouthpiece modified to fit better? will this make enough difference in overall length? Thank you for your advice.