Here (http://www.fsv2000.at/newssystem/frameNews.php?id=1509) are some pictures of the parts with some details visible:

http://www.fsv2000.at/newssystem/ima...s/TwinFW_7.jpg
http://www.fsv2000.at/newssystem/ima...s/TwinFW_3.jpg

If I remember correctly (my club used to own one, and the gear doors needed regular repairs), the right gear door (the small one) is kept closed by a spring and simply pushed open when the asymmetric gear system swings to the right to put the gear down.

The left gear door (the large one) is actuated by a long (more or less 5-6 inches) push-rod bolted to a metal tongue welded on the rear side of the steel tube rectangular structure that surrounds the wheel.

Be aware that there are at least two variants of the retracting system...