Not real happy with autometer

Okay, here we go. I put Autometer Phantom gauges in a Rocky Mountain insert. Being a realist, I ordered the 120mph speedo not the 160. The one I got had the inferior backlighting that had been updated. I sent it to Autometer and they replaced it with a reman unit. Mine likes to freeze at straight up 60 mph, after that it floats all over the place. Also, at startup it goes on the blink (sometimes) and gives all 8's in the odometer field. I installed a on/off switch so when it acts up at 60+ or at startup. I can kill the power to it and refire it up. I had nothing but bad luck with the fuel gauge and thought my problems were solved when a programmable one became available. What was I thinking!! Wrong again. Yeah, not impressed with the Autometers at all.