Or...if you're looking for a true classic, Smokey, you could check out Don McGovern's "Piranha" from the December 1966 issue of Flying Models. 74" span flying boat in the "Privateer" family (kitted by Jetco as the "Navigator" in mid-60's) for 3 or 4 channels, powered by an Enya .45. Hull is much like the Sig "Sealane", but with a higher aspect ratio wing.
Plan number CF063, $16.00:
[link]http://www.flying-models.com/[/link]
An extra couple of bucks gets you a reprint of the two-month construction article. Check it out!

pj