[Stuart Goodall]

Thanks Lowboy, oui oui, it does sound a bit like a crazy accordion. So I should consider the “click” as part of the instrument’s overall sound and character – rather like the noise of woodwind pads? Yes, it’s surprising what extraneous mechanical noises we turn a blind ear to – like the thump etc that is noticeable on piano recordings. But I like that idea.

Just the same, I might try some felt, as you suggest. My old (metal) Piano 26 doesn’t have clattering keys like this one (the tone’s sweeter, too).