[Hayden Duet Layout Planning]

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

["Sticking buttons"]

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. 

[large crane duets]

Thank you.

[Wanted to buy: 65 or more button Crane]

Open to all large Cranes. 

[Can the Crane system be bettered?]

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. 

[Looking for Crane Duet 55 or more keys]

Located in USA.