Nice boat, remind me a Katyak we had when I was a kid (a small cat, with a sail like a Sunfish). It was quite slow, but very fun to sail on bad weather, the tip would sink sometimes, but the boat would never capsize (and never raise a hull).
The problem could be on the weight of the crew, cats ar more sensitive to weight than other boats, because of the shape of the hulls. This cat is probably for only one sailor.