For anyone interested, Kensington concertinas are now available in C/G Wheatstone layout as well as the Kensington Standard ( slightly modified Jeffries ). They are also available in keys ranging from G/D through D/A. ( though a deposit will be required at the time of manufacture for everything but the standard C/G. Due to the requirement for a new Reed pan design for each Wheatstone layout, Lower pitch instruments G/D - A/E will only be in a transposed Kensington Standard layout for now. I will consider the redesigned Reed pan if someone requests it, but the Wheatstone variants cost more. ( the only difference is in the right hand accidental row and the differences there are small. See the layout on the website to see what it looks like on a C/G.