Put on upper seat backs. Did all the stuff to put the headrest frames on the seats. They are now ready to fit the fabric, but it will remain on the shelf for a few months.
Put on the seat rails guides with tape and then put a seat in. Can see what the instructions mean by getting a better allignment by using the seat. Moved the rails around until they were perfectly alligned. Then checked the seat with the pins in the most forward and back seat back positions. Discovered the bottom of the seat back tubes hit the seat rail and kept the seat from locking in position. Filed ahte interference away and the seats work fine.