I do my usual stuff: modify the ends of a 30 button Jeffries to make them fit the vertical English concertina rows:

No - it’s not a CAD program. It’s a Macintosh vector program called Intaglio.
Print, glue, drill...

Pierce, saw, pierce, saw, pierce...

One down, one to go...

Glue onto frames and rout the bevel. Now I only need a special drill/router for the end bolt heads - Roy (page 4, "Credits") is the man for that. Still is.

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