Great Planes Extra 300s .60 size
I've built two, the first one lost in a mid-air. I pretty much followed the plans and used all the stock materials.
To form the rounded forward fuselage, wet the plywood, then bent it around a gallon paint can. Hold it in place on the can with rubber bands and let it dry overnight. It will then fit on the formers just right.
Another change I made was to apply the wing center sheeting in one long piece instead of making separate left/right halves. You will have no problem bending it since there is very little dihedral. This makes a smoother joint and you won't need any fiberglass tape.
Mine weighs 7 1/2 pounds and can hover with a 91 four stroke.
Tom