I was only going to give 4 stars because they don't like to stand up by themselves but they're too darn cute, I added wee snowboards with CA glue and it works fine now. A big hit with everyone who sees them.

Always wanted one of these, and it turned out awesome! Easy to print and assemble! I filled the weight with small finishing nails then taped the hole with white electrical tape. Like many 3D Printed contraptions it needed a little "wearing in", I just gently pulled on the weight and spun the fly wheel until it worked and held it for a minute, after that it worked perfectly on its own at the touch of the fly wheel. Works flawlessly now and I haven't added lubricant to it at all. My only critique would be it needs a key or something to make it easier to wind up, my hands are pretty crippled these days, and I need to find a better spot to mount it so I can reach it better. Oh and I used fishing line instead of thread as that's all I had. Fantastic design!!! Thank you so much!