I have a set of plans for the Spinks Akromaster by Ray Borden. The construction article appeared in the January, 1980 issue of Model Airplane News. I have that issue, or what is left of it.
According to the stats in the article, wing area is 475 squares, 50 inch span, 48 ounce weight. The flaps are maybe 2/3 of the wing span, with a fixed trailing edge toward the tip. A large bubble canopy and a rather tall vertical fin and rudder. The wing is rather thin, more typical of a classic era design. In the article, Borden said the original was powered with a Fox 29.
It is an attractive plane, maybe not up to current performance standards, but performance might be improved with some mods. I suppose you could take just about any modern design, make it look like this Spinks, install something better than the Fox, and have a good performer. I have done this with the Tom Dixon Time Machine 40 and 50, keeping the main features of the design but altering the fuselage because I did not like the jet style look of the original version.