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.