... I looked at the Harrop units also. They are nearly identical. But I was afraid if I went with the Harrop unit, with the name blazed across the top, it would be a 100% buzz kill every time I have to have the old girl smogged. I am hoping the smog tech won't be triggered by the VCM as it is a "Plain Jane" unit.
That's the same reason that I picked it, as well. I don't want to have to take it off and re-install the OEM system every other year. So far, it fooled a couple of techs in our shop who thought it was OEM!