It looks like you have done your homework well. In doing so, you have stumbled upon the lack of commercially available floats in the right size for your plane, Selecting floats should be like selecting shoes. First find the proper length, then the proper width. The proper length will give you the water handling characteristics you want and the proper width will give you the bouyancy you need to properly float the plane. Our problem is most float suppliers only make one width which in many cases is too wide (more floatation than is required) Don't let this discourage you. If you strictly adhere to float selection guidelines you may end up not float flying at all. If you want to get into the water you may have to bend a little, I've seen the Kadet Senior fly on 42" floats and on 34" floats with equal success. I would never have suggested 34" floats but I saw the results.

I would suggest around 42" floats for the Kadet Sr. but if you go with the wood kit floats which will work, they will be a bit too wide and too heavy for optimum results. I use Plane Fun Floats 42" Slim floats on my Senior and it is the plane I love flying the most. I am the maker of the Plane Fun Floats and I'm not trying to sell you a pair of floats. I'm just trying to share with you my experiences as did Jim and ED. I'm sure Mark at Seaplane Supply has an equally suitable set of floats for the Kadet and he is a great guy to work with.

I hope this helped.........Ralph