[ChrisH]

The mounting holes for the Van Door are 1/4" dia on a 1.5" radius. They are 120 degrees apart. I typically have trouble getting it to line up properly. So here's how I handle it.

First use an INSERT constraint on one of the mounting holes on the motor. I usually use the one that sticks out at 90 degrees to the motor axis.

Then I use an angle constraint between the edge of the mounting plate and the web supporting the mounting hole. Adjust the angle as needed to get the holes to match.

The speculation that the problem is not getting the numbers to match is probably correct, but we don't have the ability to specify the numbers to the tolerance needed to eliminate the issue.