Doug and James...back in the mid 70's I designed a plane called the "Overdose"...for the overdose of power, control size, etc.
It had a very short (in height, as sort of a minimalist structure ) and narrow fuselage w/ what I called a "knife edge ledge" or chine that ran the length of the top of the (42" ) fuselage.
It had a 42" span also, made from a Sullivan PDQ foam wing, clipped to 42". Powered by a K&B .40 w/ pump, it pre-dated todays "fun fly" designs, and with huge tip plates, would knife edge the length of the runway...
My tip plates were 1" larger all the way around the tip and added a lot of side force, and drag (can't have everything )

When I got my Showtime kit, it prompted me to do a SFG experiment w/ the Tribute.

http://www.rcuniverse.com/forum/m_3318539/tm.htm