unfortunately instrument workmanship and master craftsmen are becoming a dying art.
You are without doubt a true professional and your attention to detail and level of craftmanship is a true blessing to all those that play a musical instrument. I have now used my trombone since returning home and I am delighted to report the slide performs as new, no impediment to playing or visual indication that it had been damaged. As you may recall I had previously had three instrument repairers indicate to me that the damage to the slide after its fall could not be satisfactorily repaired and that I should purchase a replacement. I would like to pass on my sincere appreciation for the repair you undertook to my Bach Trombone slide and service to the instrument. and at one stage I even contemplated trashing it! Not quite three octaves, but close enough, and all this on a previously damaged vintage horn: I have never been able to do this even on a brand new instrument regardless of how hard I tried. How does it sound? With trusty electronic tuner at hand, I checked all the usual tuning notes: PERFECT! Then starting at bottom F#, slowly and deliberately played every note in the chromatic scale to top E (above top C) with intonation precision and unbelievable stability. Morrie repaired the crushed bell, built a new lead pipe from scratch, rebuilt the (unique to Olds) pull ring tuning slide mechanism that controls the length of the bell, then set out to make it look a million dollars. Disaster struck and it was badly damaged in transit from the USA, so much so that it was difficult to force much of a sound out of it.
I finally found a much sought-after Olds Recording Cornet.
Canberra Solo Cornet Player: Victoria Street Brass.