Dummy 13 treadmill

Is your Dummy 13 getting stiff from sitting on the shelf or desk? This is the perfect tool to get him in shape. Equipped with a small water bottle, he will never get thirsty while exercising. while you are at work or on vacation, he will never get bored. I hope you enjoy this model as much as i enjoy designing and printing it. the belt may need to be printed at 99% to fit on to the rollers This project uses none more than 4 ball bearing listed below. The size of the bearings are;12mm outside diameter, 6mm inside diameter and 3-4mm thickness. notice: your feedback on this model is greatly appreciated. i would like to know what you think and improvements you would like on this treadmill.