Paul,
I added the string hold down when I had to much tension on the upper machine heads. My head stock was not angled and the strings were winding high in the machine heads and could not get it in tune. I had the bass strings under it also but snapped a couple. I was running out of strings last night so I tried to lighten up the tension. Since the photos I lowered the nut and all the strings are under the bar and it plays great.
Comments
I added the string hold down when I had to much tension on the upper machine heads. My head stock was not angled and the strings were winding high in the machine heads and could not get it in tune. I had the bass strings under it also but snapped a couple. I was running out of strings last night so I tried to lighten up the tension. Since the photos I lowered the nut and all the strings are under the bar and it plays great.
Trial and error and get it until it works.