This year I purchased a Comgrow version of the Sovol 8, and was happy with my purchase. However after a while I started having problems. The tool head on a fairly short print somehow caused a failure. It extruded a lot of filament in a hard ball then caused the cover to be torn off and thus damaging the fan in the cover. and completely fried the computer on the machine. I was very upset for I loved the prints I was getting. I did research on the problem and found no one who has had the problem. I then ordered the new tool head. In the mean time I figured out the problem and reflashed the computer. Then replaced the new tool head and so far it is running great. I also ordered the Sovol version of the sovol 8 and am happy with it. I also own 2 other sovol printers a v4 duel head and a v1 pro.