Update: yeah those two hard plastic bands broke within 8 hours each. I think the cold might be the culprit since I milled for days on the first one. I recommend this silicone band / o-rings size as replacement. It's working just fine:https://www.amazon.com/dp/B000FMWPAG/ref=cm_sw_r_cp_apa_fabc_SH9YNVM4NERBKT57VZ0B?_encoding=UTF8&psc=1Old post: The mill feels heavy and it is not because of added weight. However inside is a little scary. The controls are all plastic inside. I think most of the wires are low voltage coming from the transformer. There was a rattle and I had to open it to see what it was. The transformer was lose with only one screw holding it in place. I removed the good screw to be able to remove the one that wasn't engaging. The screw head is the size of the transformer hole, and the transformer screw tab is bent to fit the mount location. But OK. I filled it half way with stainless bolts and tossed in two beer bottles. I actually hammered the bottle into the container.. it really is polycarbonate which is great. Added a little bit of water and after 8 hours of milling I ended up with some powder. After doing so for 1 hour I realized that this thing could burn down the house because it got really hot. That's when I opened it. Then I ran it for 1 more hour but with no bottom lid, tilted on one side and with a little fan blowing air into the bottom. I ran it for three days straight and the motor was nice and cool.. almost warm. The rods seem to be pretty strong and no complaints. The tumbler container is excellent I'm construction but a bit on the small side for milling. But it did a great job. It's easy to open, but not easy to clean or empty in a clean way. The transparent finish was completely made into a matte translucent one. But it's easy to open and check the insides. I had to run it on the first speed. The higher speeds are way too fast so the balls would just stick to the wall and spin. The motor is plenty strong to rotate the tumbler with
Jimmie 
