I’ve been continuing to search for answers about Cyberhammer compatibility with the U1. Based on limited information, I think Jerry's comment
is really about the non-folding part of the lid getting in the way. That said, it still seems it should be usable, though maybe not in a vertical orientation. Here’s a picture
of the Cyberhammer on a Yamaha U30A, which has a similar lid design. It’s inclined about 30 degrees relative to the horizontal, though it might be a photo op instead of an actual action shot.
My remaining concern is about how well the Cyberhammer works on tight tuning pins. There's a variety of opinions on this forum, from easier: 1
to harder: 1
. I think the Fujan is the safer choice here, but Cyberhammer seems like it should also work given enough patience?
Those who are new to piano tuning like me, might appreciate the Piano Tuning Game
app for iPhone/iPad. It's helped me discover that my ear is not that sensitive and cannot distinguish an error of 6-14 cents depending on the interval. I’ve also tried the game while running Pianometer on a second device, and that enables me to tune within 1 cent quickly and efficiently. There’s no game mode for tuning unisons, so I practice by tuning adjacent keys to the same pitch. The standard advice is to tune unisons by ear, but I’ll be using an ETD for the first pass after seeing my results.
johnlewisgrant, I appreciate the advice. Your results as a DIY tuner are very encouraging! Good to know that a non-professional can get stable, accurate tunings with proper tools, technique and piano maintenance. Reyburn’s impact hammer for upright pianos is an "L" shape with a single arm. Gravity makes the second arm unnecessary.
Anthony, thanks for providing an informed, trusted perspective. You’re correct that ergonomics are not really a consideration for this amateur. Almost all of the benefits I’m seeking are a consequence of using impact technique as opposed to a specific design of tuning hammer. Though for first-time tuners, I'm guessing a dedicated impact hammer has less risk of damage since it imparts a pure torque to the tuning pin.
On another note, Pianometer is awesome! The app is intuitive with a display that’s quick and accurate. Excellent work!