When I do projects, I use 65# Spiderwire - Stealth Braid. It has not failed me yet. I am currently repairing a British 120L Bergan with this line.

My next project will be to make knife sheaths and those will be made out of surplus molle radio pouches that I can get for $1.00 each.

Good luck on your projects and give the Spiderwire a try.