This was a fun project. It started as a crazy idea late one night at the hanger, evolved to a few sketches, and a couple weeks later there was an open cockpit Extra 300! Starting with a damaged Extra canopy I cut out all the original canopy, bonded in a cover over the front seat, reinforced with a foam core, and installed the windscreen. The canopies swap out in about 60 seconds. Initial flight tests showed no aerodynamic problems and no loss in cruise airspeed. It is a truly unique experience flying open cockpit aerobatics in an unlimited monoplane.