The equipment is high-quality, no question. What I find worthy of improvement: -the speed could go a little further under 5000 r / min, 1000 r / min would be good, but there are certainly problems with the cooling, depending on the load. If you want to edit these plastics will melt quickly by the heat at the relatively high speeds. -The locking knob could be a little deeper, because it could be accidentally pressed when working, at 20,000 revolutions that would certainly damage. -the spindle has axial play, an estimated 0.1 to 0.2 mm, (can be felt and heard). Take for instance the device as Graviermotor. would like to take in a Gravograph leading to inaccuracies. But when Hand-held sander it is ok for the money. The best would be if you could retest the device before purchase times.