Actually it's www.performancecat.com but I agree with prior posters, the manuals, at least for the Nacra 5.5's, SUCK. They explain in detail meaningless stuff and gloss over or leave out entirely items that should be addressed.
For example, they talk about tensioning of the diamond wires and bridle but leave out pre-bend of the main beam.
I wish someone knowledgeable would write a tuning guide for us.
Greg

The nice part about being a pessimist is that you are constantly being either proven right or pleasantly surprised. - George Will
"It's not that liberals aren't smart, it's just that so much of what they know isn't so" -Ronald Reagan