I finished my medium Crazy Clock about a week ago and it has been running flawlessly. This was the first time I tried bi-color silk filament and I love the way the gears change color as they turn. My picture doesn't pick this up well. I also love how quiet the clock is. I can place it anywhere in the house and it doesn't annoy anyone. Thanks Steve for another great design! This is my third, the other two being the Easy Build wall clock and the Coupe Perdu.