I just put some Paraloc brand Pirhana line on for the halyard on the Tornado. Used 4mm (~2700 lbs tensile strength). I like the grip it affords compared to bare spectra (which must be used with gardening gloves w. latex palms). This line is supposed to eliminate hockling (twisitng) and hold very well in cleats as there is not cover to core slippage.
So far, we've had a couple of problems on our first two douses. We use a 3-6mm range Spinlock (new version) as halyard cleat and for some reason, the untensioned side of the line seems jam up trying to go through the spinlock, causing it to sometimes re-cleat. There is still some pre-twist in the line so I want to remove that before any final judgement about the line's qualities.
The line appears slightly oval and rougher on oe "side" where the stitching process appears. The shape I think causes an eery sort of whitsling when the line is on leewrd side of the mast at speed. This might disappaear with line use.
Mike.
Have suffered the same problem. Have tried washing the rope, untwisting etc. The rope looks fine, but when the kite is hoisted, top 1m of spin is twisted. My guess is that core has somehow twisted in side the outer sheath.
I'm going to try a new type of line called paraloc (
http://www.apsltd.com/Tree/d279000/e277617.asp ), where the core is braided with the outer sheath. Hopefully might solve my problems.