The angular lines of the SE5A lend themselves well to the profile control line model shown in the links below. I don't have any information on the model itself. The "brodak" in the URL's suggests construction from a Brodak kit or plans; if so, it's a model no longer listed in their website catalog.
http://virginiahobbysport.com/images...p/CIMG0046.JPG
http://virginiahobbysport.com/images...p/CIMG0047.JPG
The top image shows the classic CL practice of putting as much mass as possible (e.g., the cylinder side of the engine and the fuel tank) on the outer half of the model in order to maintain tension in the lines. Other tricks include putting a weight on the outer wingtip, thrust offset, fin offset, and (rarely) making the inner wing(s) slightly larger to generate more lift.