7
Does a decent job
I've used it a few times for tuning the occasional out-of-tune string on my upright Kawai, but preferred the rubber wedges over this Diskant tuning wedge. As this is plastic, it slips easily and can sometimes get lost at the bottom of your upright, but if you have a normal (concert) piano, you wont have this issues. Gave it 4 stars total because if the spring was a bit stronger, it would hold the strings more firmly. I need to say that I am an occasional amateur tuner for personal purposes only, I tune my piano ever so rarely if one string gets a bit out of tune. Of course, once or twice a year I get a pro to do the proper job.
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M
Not best for uprights
This will do the job for pianos, but for uprights, it tends to jump out when striking the middle string due to vibration. I fixed that by heating the ends with a firelighter gently until plastic became soft and bent each side a bit outwards, it works fine now, the clamping power is sufficient.
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