There is plenty of discussion regarding fret saws, setting your fret, fret slot dept, etc. I haven't been able to find very much discussion about the different types and sizes of fret wire. When I placed a reorder with Gitty for fret wire, I accidently ordered a smaller (not much) fret wire. Then I noticed the frets on my Alverez of 40 years ago that I pulled out of storage, had thin flat topped frets. can someone shed some light on the subject. which is better, which makes for easier play?