Given my experience, I agree with Jarndice about Mato (lack of good) quality. It isn't just a matter of the quality of the metal or the lack of interchangeability with other maker's parts or aftermarket parts: Mato tanks are just prone to both mechanical and electronic malfunctions and outright failures.
I have had two Mato M10s; on the first I gave up and scavenged all the parts I could (mostly electronics). I tried again years later, and the second has forced me to settle for cantankerous track running (despite various attempts at alignment, various repairs, etc.). Atop that, the recoil never functioned at all, and the gun elevation servo failed after just a few moves.
