Sorry. I'm not capable at all, drive a 4x4 Avalanche & can find the middle of the tailgate in the mirror without a problem. I just backup till I think I'm close, get out once & look at how far I'm off, then spot the same distance on the ground next to the driver's door. Works fine on the boat or ATV trailer, neither of which move all that easily.
I guess it is a great invention.
(Message edited by bill_airjunky on November 12, 2008)