Amateur tuner looking for advice on a Kranich & Bach square
Hi all,
I have a rich friend who collects rare instruments. One of them is a Kranich & Bach square grand from the mid-1870s. He wants me to play it at an event, but - big surprise - it's out of tune. I know how to tune pianos passably well - I've done it on my own modern grands (a Yamaha and later a Steinway). But this one seems like a different beast.
I told him he should probably have an expert look at it, but he's been burned by bad tuners in the past and says he trusts my judgement more.
So, anyone who's tuned a piano like this before - what should I look out for? What should I do to avoid damaging it? If you think I'm hopelessly in over my head, please explain why - I'd like to understand what I don't know.