Ok, Since my boat is being fixed, I'm going to re-vamp a few things.

My mainsheet is big, fuzzy, and gets heavy when soaked. it's 6 or 7:1 purchase.

I've found some pictures of tornados or even a M20 running very thin sheet material. Appears that they run the thin stuff through the blocks, and put a cover over it (tapered) for handleing.

The M20 even had a 12:1 purchase!!! Using very small looking blocks.

Anyone have any insite into a mainsheet like this? I'm sure the cordage is $$, but if it's lighter, stronger, and allows it to run freer (sp?) I'm game.