my cat is an 18 footer and I belive the mast is 28' , what should I be looking for as far as luff, leach, and foot measurements. in fact, what are the measurements of your hooter's. If thats not too personal a question. Also, I have noticed that the genoa sails have a % listed in the spec's. what is that? Should I be looking for a Gennaker instead of a Genoa? it sounds like a "Gennaker" would be made of a lighter material but may be cut too full to furl. Is this right?