About 10 yrs ago, one of my flying buddies gave me a set of 31'' EZ floats. You are right, it is a foam core float and very light. Weighs 20 oz. complete with music wire mounting. But the size was just marginal for my Citabria. ( Need 33-34")The company quit importing them and you could only by them by then if you bought them in large quantity.

All the foam core floats have to have some finish from what I know, e.g. f/g or thin balsa. Does that not add some weight? And of all the foam floats out there, which one(s) the lightest after covering and give good handling and control spray?

I almost got the Niagara floats but after looking at the recommended covering procedure made me wonder about the weight of the floats vs the Falcon, which is what I have now. They never got back to me with my questions and that is why I opted on the Falcon floats.