mskow

Thank you both - I had been aware of the range overlap, but didn't know about the 3 duplicate notes.

Thanks. Does that mean there are duplicate notes on each side? Within that range there would be 67 pitches, 37 RHS 30 LHS

Sounds great. Can you share the range of your instrument?

Were you able to find a maker without a multi-year waiting list?

If you decide to use a lubricant, consider Protek Prolube. It is made for piano technicians to use at felt/metal contacts, and in my experience has been both effective and benign.

Thank you.

Open to all large Cranes.

I now have a 55 key Lachenal Crane in this configuration. Purchased about 6 months ago in standard layout (my first duet, and first concertina aside from some very limited trying out of an almost unplayable English), and after a few months began the transition, then sent it off to a shop for refinement, and received it back just a few days ago. It's unidirectional, with lowest C keys on both sides in the index finger positions. Am very positive about it. During the beginning of the reconfiguration I had been very curious about whether a 6 CC as mentioned by Little John would be a better way to go, and had done some tabletop practicing, but decided to go with what I already had, and in any case a Maccann might be more problematic to convert, though I've never seen one so of course don't know.

Located in USA.