Ten pound test would work, but Twenty pound test is easier to work with.

Spectra fishing line requires special knots, and we have been using the Palomar knot. Note that the Internet video for tying this knot is for attaching a fish hook, but it also works for the small (half-A) slider line clips that are available. Tie it to the closed line clip like you would a hook eye, and pull it snug.

Do NOT use CA to hold the knot, as it will create a hard CA stress point that will eventually break strands and fail. Tie the knot dry, are lubed with water or spit to pull it tight.

The only other failure we have seen was when a club member shortened a set of lines, and the knot was tied without cleaning the Castor oil fuel contamination!

Bill