I am new to this forum so this may have come up already. I am looking for any documents or data for Kit 756 896. This is the upgrade for the stab trim that replaces pulley drive to the barrel drive. I am in the process of renovating a 1963 PA28-160 and noticed when I ferried the plane, the trim was slipping. The kit is expensive and has a long lead time. I believe it is just a replacement with the newer system used in later years.