Todd,

I assume you are talking about the single line retrieval system on the Vipers and C2 when referring to the under tramp halyard? Pretty much every line seems to twist and be liable to tangle in those. Point is, I doubt it is the racing sheet, though that line is a little worse at untwisting itself than others.

Jeff,
Might suggest adding a cover over the racing sheet where the head banger cleat engages the line when the halyard is up. Both Tripp and I had to do this on our Infusions to ensure the cleat would hold under reaching conditions...the line stretches under load, narrows, and starts to slip. Other tip is to add a bolt to the head banger to keep the head banger from opening and allowing the cleat jaws to spread apart.