any custom concertina maker recommendations? in General Concertina Discussion Posted August 22, 2021 Colin Dipper has made some 48 key English double action basses, essentially for the West Country Concertinas group at Ruishton, Taunton, and he has mended my single action Wheatstone C bass. His son John (the folk fiddle man!) seems to be taking the business over now at Heytesbury, Wilts. I don't know whether anybody has made any with double reed pans (ie. two at each end, one with the big bass reeds, and lots of wooden plumbing, which reduces the size a bit. I don't know whether that needs to be single action either.) There is a tremendous variety in bass concertinas - they were probably all made to custom specs.