Light Weight Lazy JacksCascade system for yachts up to 10.5m (35ft) These all-rope kits still feature our unique block covers but are intended for smaller yachts or lightweight use. Not recommended for large yachts or fully battened mains. We also recommend that the use of a topping lift is retained. Cascade lazy jack kits Available in standard and lightweight format. For use with longer boom lengths or where more sail control is required.