Originally Posted by
Simon Barden
IMO those string butler things are a solution looking for a problem. The key to stable tuning is all about having properly cut nut slots. Invest in a good set of nut files and you'll have guitars that stay in tune quite happily. If the nut is poorly cut or too narrow for the string (a problem I encountered on my 2018 LP Classic Gold Top) then you'll have tuning problems regardless of what additional hardware you fit.
There are no tuning stability problems at all on my Gibsons (3x LP, 1 x Flying V, 1 x Firebird and 1 x CW acoustic) or my other guitars with Gibson style headstocks. The Gibson style headstock design will certainly exacerbate the problems of a badly cut nut, but cut that nut correctly and there is no problem to make worse.