I've been into Lego for a few years now. I used to buy Technic in my teens then took a break and rediscovered Lego a few years back and started collecting the Creator series (3 builds per set is good value). I recently started collecting the 10000 series sets because of the incredible detail and at present think that the Emerald Night train set (10194) is the best.
For a while I was trying to build a biped (2 leg walking machine) driven by one motor. I came up with some interesting designs that I might post at some stage.
Now I am working on a semi auto (but initially bolt action) pistol. Features: Explosive bullets, removable magazine, pull back slide, trigger, ejecting shells/casings. When I get the chance Iíll post my progress.
I encourage you to use and adapt my designs. Let me know if you come up with any improvements.