Here you can see photographs of peanut models. For now a few models from deep and even deeper past, hopefully new ones will be added soon.
[Felda]
Img. 14/15: Macchi Castoldi MC-72 by Felda, also with counter rotating propellers never made it in the air, contrary to Koutný's Rex. The drive mechanism ws solved differently by a single rubber band with rotational tube and this solution proved to be unusable (built by: Felda, photo: Felda)