is 5/16 stasetx a good choice for main halyard?
Yes, .....well maybe.:) Are you planning to do an eyesplice with a halyard shackle? I bought some StasetX with the intention of making a spin halyard and after three failed attempts to do the eyesplice I went back to regular staset which I have always been able to do the eyesplice in. I like the fact that the X is very low stretch but can't do the eyesplice.
For my Spin it doesn't matter. If I were to replace a main halyard, I would use X but have the supplier do the eyesplice.
kicknbug, have you found anything on this? I seem to have lost my halyard during fall take-down (how that happened is beyond me), so I'm in the market too.
Here is a thread on this.
http://www.cruisersforum.com/forums/f116/staset-vs-sta-set-x-58138.html
Good luck.