Yes
I have built a storm jib, storm trysail, asymetrical spinaker all for my O'Day 35. I have also built a 4 sided sail for my sailing dinghy which was a custom made design.Their kits are fantastic in terms of materials, quality, and the best instructions you can imagine. If in trouble call and they help you over the phone, when was the last time you called for help and got a real person instead of a computer?Great company...Davep.s. I am not related to them and have no financial interest in the company, nor any business dealings other than a customer.