Other web sites of interest.
Caution: You can spend all day on these sites.
http://www.seacommander.com Another float manufacturer.
http://www.smilesandwags.com/Floats.html Links to various sites which contain a wealth of information.
http://www.seaplanesupply.com/ Sea Plane supply
http://www.planefunfloats.com Foam covered with balsa floats. Various sizes
http://www.wattflyer.com/forums/showthread.php?t=22218 A forum that contains a lot of links for floats
http://www.rc-float-flying.rchomepage.com/Electric%20Cores/basic%20article.html Neat way to make floats
http://www.maxfordusa.com/21floats.aspx Has a Neptune which is like a Seamaster. Eagle Trainer TUT-40 on Floats
http://floridafloatflyers.org/ Good site with a page of FAQ about float flying.
Wheels to Floats article (MANnov1959.pdf) by John Wick in the November 1959 Model Airplane News.
The float design file (RCM 93floats.zip) below is by Chuck Cummingham that was printed in Radio Control Modeler in 1993.