There can be few of us that have not seen the famous video of Romanian Prince Constantin Cantacuzino flying EC-AEX inside a Spanish arena. Every copy I have seen, however, has been of very poor quality.
Jesus Ballester has just sent this link to the best version I have yet seen, and finally it is possible to see some details of the aircraft.
Click here and select the "Acrobacia Aerea" link, or just click the image above.
¡Graçias Jésus!