I recently purchesd La Bella Black Nylon Tapewound "Beatle" bass strings for my Hofner 500 / 1. I've now had two luthiers tell me that these strings can't be put on my bass because they are too big to fit in the tuning pegs. Is this a situation where I can be the stupid one? La Bella calls them "Beatle Bass" strings. Should they not fit PERFECTLY? Anyone have this problem?