A general rule of thumb is to use floats that are about 75% the length of the fuselage. The pre-fabricated “Zeedoo” fiberglass floats at Hobby Lobby came in various sizes and the largest 39” set provided about a 72% ratio which was just about perfect. Although the floats added about 1.5lbs more to my flying weight, the stock Monocoupe wheels were also removed to drop the weight by 11oz. My net weight gain was about ¾ lb.

The Zeedoo floats are very strong and easy to install. I used the stock Monocoupe gear axle for the front struts and hand-made a rear strut from 0.156 (5/32) music wire. The rear strut was then attached to the solid brace just behind the cockpit area and reinforced internally. I used Dubro (#158) Steel Landing Gear Straps to attach the music wire to the fuselage.