Hi. I ordered plans for a flying boat called the Liki Tiki from RCM. I haven't received the plans as of yet but I'll let you know how they are when they come in if you like.
LIKI TIKI
Plans link
72" span, 720 sq. in., (2) .35, 4 ch., built-up balsa, plywood, and foam core sponsons, one sheet 39" x 59"
I'm going to go with OS 46 FX's on mine. I'm going to build up wood/fiberglass sponsons also.
RCM sells the plan for only $9. I don't know if this is a good thing or a bad thing yet.