Installing Grover Mini rotamatics locking tuners on Yamaha 112J

[comedybenj]

Are grover tuners hard to use?

[Velbright]

Hi, I have a PAC112J and was wondering what the model name of these tuners is, as the stock Yamaha ones are awful. Thanks :)

[JLEOLEGACY]

@Velbright , MINI LOCKING ROTOMATICS® (406 SERIES)

[raxig]

Is it the Grover 106C?

And if it's them, how lock the strings? (I answer this question because there isn't fitting screws (I hope you understand me, I'm french xD)

[JLEOLEGACY]

@raxig

Pull string tightly through machine head then bring up to tune, finished