Anybody out there have any experience with Fischer Technik? I stumbled upon the website of Hobbyengineering.com and bought a set and now myboys are addicts. The pieces fit together with a dove-tail slide so the assembly is very solid when completed. If you are into robotics, but get tired of having to buy crap off e-bay with 10$ shipping on a 1$ robotics part, you might want to go the "ready made" method. They are a lot like Legos, but different.