Modifying Layout For Wheatstone Anglo C/g On The Low End in Instrument Construction & Repair Posted April 30, 2018 · Edited May 1, 2018 by swahl I've done this myself on all my 38 key anglos, but on a 30 button anglo, it would be a really difficult decision, since the low F and Bb are such important notes. It's perhaps worth remembering that F major is the lowest key you can play in on an anglo where you have the complete diatonic lower octave and leading note. I can understand why if there is one, some might put it on the LH thumb button. It is a difficult decision to make as I do make use of almost the full low end of the instrument. Meanwhile there are at least 3 buttons on the high end I can honestly not remember ever using in a tune. That is a good point about the full F major scale. I don't actually know any F Major tunes, but I suppose I may wan't to in the future. I guess it might be just be better to look for an instrument with more buttons or a drone button in the future.