Can anyone help me fix my K'NEX Serpent's Spiral Coaster?
I've built this model a year ago and i just recently built it again and for some reason it gets stuck right after it goes on the first u-turn around the front. When i first built it, it worked fine, now it wont work!! And suggestions? Please help me. Whose ever answer is the best, will recieve a 5* on all of their instructables. So please help me. By the way I'm an experienced builder but I cant come up with any solutions. There is also a video. Click_here_for_video.