Here is my current favourite MOC: (2 URLs) It's a Lego implementation of an amazing mechanical puzzle invented by Oskar van Deventer and Bram Cohen, as seen here: (URL) I can't improve on the explanation given in this second video - just watch it! (...) (15 years ago, 6-Feb-10, to lugnet.technic, lugnet.announce.moc, lugnet.robotics)
(...) Really nice. And thanks for the LDraw instructions. I really like building this kind of contraptions and mechanisms. Jetro (15 years ago, 6-Feb-10, to lugnet.technic)
(...) So do I... Now I just have to find how to align again the fingers without dismantling everything ;o) Philo (15 years ago, 7-Feb-10, to lugnet.technic)