The piper and pipemaker Andy May, who has studied many of their surviving complete sets and chanters, has written, that they were the most prolific makers of extended-range chanters between James Reid who died in 1874, and Bill Hedworth who began making them in the 1950s. In particular, they extended the range further, down to low A, and in at least one case low G. The latter chanter has the keys for low G, B and A mounted from left to right in a single block, and May believes this is the first chanter made with a range down to low G, and the first use of such a triple key block. Young Tom Clough believed much of the work developing such chanters was done during the General Strike of 1926. Other innovations in the extended Clough/Picknell chanters are that the pairing of keys is different from that of the Reids' chanters, and that the lower holes are sited significantly lower down the chanter than on comparable Reid instruments, improving the intonation for these notes, and making the instrument easier to reed. There is a newspaper photograph of Tom playing on pipes with an extended chanter at.