Saxus Circus Maximus
What a nightmare these fractional measurements! It's time to transition to metric. The only sensible scientific and engineering system there is...11/16 bari, 43/64 for tenor, 5/8 alto, 17/32 soprano and they should all be cylindrical. I have "opened up" pieces using a drill press and hand-holding the MPC, not really the best way but I'd prefer it over a hand reamer.