Billy, Did you ever get the door puzzle solved. If no, email me at
RAuker23@att.net. If I understand the nature of the problem it yields to straight forward use of a landing gear data ref. The trick is to insert and intermediate control point to hold the rotation at zero degrees until the landing gear its linked to has reached something like .9 . You'll have zero degrees at zero time, zero degrees at 90% and full motion of the door at 100%.
Bob A.