Hello; I have a Bingo 60 on floats that I have been flying for at least 8 years. I have a Saito 80 on it, which powers it perfectly. I bought it from a fellow who bought it at Puyallop $60. I have a 4*60 too with an OS 90 FS, they are very similar in flight manners, no surprises, very steady. I haven't considered putting a larger engine on it, the 80 seems adequate for me here at sea level. The extra weight of the OS 90 wasn't needed when I went to the floats. I really like it, but it's getting a little ratty looking and (probably) needs a re-cover job, I am a little ashamed to bring it out amongst all the beautiful new covering jobs at our lake flying site.