Sometimes still need to refer to tutorial with diamond knot
after making many soft shackles. Wish I had seen button knot this
when I could justify staying out of the weather
and spending hours making shackles.
Regarding chafe concerns, I have put tubular webbing on
some of my Amsteel soft shackles. The type climbers use, available at ERI and others. Will keep an eye on test shackle
on alum toe rail during season. Realizing on most applications