I am trying to refurbish an Epiphone Zenith that belonged to my Dad. He bought it around 1959/60. The Machine heads on it are worn out. I bought replacements, two sets of three on silver plates but the spacing of the holes on the headstock of the guitar are slightly wider than the spacing of the posts on the machine head. I had (naively) assumed the spacing would be standard. Can anyone recommend a machine head or a manufacturer that makes parts compatible with an Epiphone Zenith? Many thanks in advance.