Like the OP, I have a Jones 30-key Anglo. Like his, it has B/D on the lowest key on the left G-row, and G#/G on the second key on the right accidentals.
In addition, my lowest key on my left accidental row is G#/F. There are various discussions about the low B/D and the right accidentals (one old post is here: http://www.concertina.net/kc_key_layouts.html),but I haven't seen *ANY* mention of low G#/F (in place of the usual E/F on push/pull).
I am certainly considering permanent changes (AKA vandalism) to some or all of these. Dave Elliott is prepared to consider insertion of replacement reeds -- and since these would be Lachenal-style reeds rather than Jones-style, this would entail changes to the reed pan etc. Solder sounds easier and more reversible -- does it have any drawbacks?
Before I go down the road of permanent changes, I'd like to understand the thinking behind the original (or presumed original) layout. As other posters have said, there is already a low D on Pull, so what is the point of another? Even more inexplicable to me is the low G# -- what scales or chords does this serve, and wouldn't they benefit more from a low E? Can anyone speculate on the original justifications?
Thanks.
Ed
