Finally had a chance today to install/calibrate my Autolover A8 obd2 hud. Only the voltage is off, but don't care about that (couldn't find the adjustment for it). RPMs and speed are accurate which is all I care about. I'm pretty impressed with this. Had to install the square screen that came with it though as the 1SS windshield is not hud friendly. Also, the screen can be seen from the outside as a square patch against the windshield. If you're ok with that, it's a very affordable usable hud.