I was planning on replacing the wire gear it originaly had with some aluminum gear. I took the wire gear out of the box and it is about 13.5" wide so I guess I will just make my aluminum gear about the same. I just wasn't sure if the try floats required more or less of a spread than dual float setups. 13.5" will give me just over 25% which is the standard on most float setups. The airplanes all up weight is supposed to be 3.5-4.0 lbs. I am putting a 46 on it and the floats so I will be up in the 4.5 - 4.75 lb range. The floats are about 3.5" wide and 16" long and 2.8" tall at the step. I have not got the tail float done yet. I wanted to see just how much bouyancy I needed for the rear after I get the fronts on.