These days the taper is tied 60/40.
I found little difference in performance.
If you pm me your address i can send you some.
Regarding the visible lines I use. I wish there was an opaque fluorocarbon level line. The lines I use are heavier than LL, yet I use them because they offer a lot of utility to me. Recently I have been able to appreciate LL. Go gave me some really nice LL and I have been making use of it, but I only use it in ideal conditions and during the normal season. Most of my fishing is in the winter and the colder water months and I tend to fish deeper, so using my running line as an indicator is really critical to me converting fish.