[Bob In Ct]

It seems to me that the lasers on the rear need to know they are farther apart than those on the front, otherwise the back wheels will be toed-in.

What if the rear track was 2 feet wider and the lasers didn't know it, wouldn't that cause the machine to toe-in the back thinking the wheels were one behind the other? If you were using strings you would certainly adjust for the wider rear track.

Bob