Do you know of any firefly projects for sale???OK, understood. Consider the fact that the Firefly, without the windshield and fiberglass nose, will possibly give you the same wind in your face feeling, but I believe the Firefly is a more well-developed structure than the Ultrastar. There are several important advantages to the Firefly, so if you can get the same kind of flying experience with it then it should be a bit more desirable, stronger, fly better, etc. The Ultrastar propeller clearance to the ground is a lot less. Definitely the Firefly will give you a lot more safety in the event of a hard landing.