I have a 100 year old German baby grand and I need to tweak some of the tuning on a few things. I bought a square entry tuning hammer but once I bring the tuning up (it’s on 430 because not holding concert pitch) the hammer gets stuck on the pin and inevitably once I’ve managed to get it off again I’ve moved the pin.
Should I be using a different shape/size tuning hammer or prepping in some way (they are all a bit rusty etc) I realise tuning is a skill and I could get a pro in but I would like to do this myself (at least the little tweaks). And I’m not up for ditching the piano because it is beautiful and not ready for the scrap heap.