Yeah don’t. Despite advertisements to the contrary, unless purpose designed and built by someone with extensive gyroplane engineering and aerodynamics knowledge, it’s very dangerous. Very much like playing Russian Roulette with 3 chambers loaded.
Me too, but it seems like a lot of work and time to modify mine on my own to make it work. About 90 miles west of you in Graham, TX are a group of guys who are serious experimenters w/gyros. I don't know if they have any float flying experience, but I recommend you go talk to those guys.
Heck, I'll meet you there and we can do some hanger flying with them and get some ideas or decide it's not worth the hassle. My fear is it will turn my nice flying tandem gyro into a heavy, unstable pig.
Here is a link to a video of a program that featured the late Gyro Jake. In it they explore putting a gyro frame on floats. It's fun to watch and see Jake but you do have to fast forward through commericials that the program had.