Hi Uogecko,

If the spinnaker line is twisting, you have 3 options

1 - Live with it! take out the bias, you can do this if its ocassional

2 - strip the core, I leave the cover on from the first pull at the mast.

3 - you can use batter quality sheet, that doesnt have the bias problem, robline is good, although you will need to use 5mm as the smaller diam will pull throuh the cleat, robline is a little stiff if you prefer a softer feel try Endura braid by Newengland, both of these I use on my infussion and have never had a problem, saying that the tapered line supplied by NACRA has never twisted, although the std line which is not stripped they twist, wich is great for a few places in any race. The halyard twists when the core and cover move, so another optio is to use a single braid like mafioli, this I have also used and have never had a problem with twisting, I would recomend using a 6 mm if you use a single braid as they squash in the cleat.