Van's newer flap actuator part number

[noelf]

A long time ago when I built my -6A, the flap actuator p/n was ES-85615-157.
Today the p/n is ES-85615-157-1. When I talked to customer support this morning, they did not know what the change was.

Does anyone here in the brain trust know what the differences are between the old and new part numbers?

 

[bhester]

Maybe

Maybe this:
https://www.vansaircraft.com/service-information-and-revisions/sb-04-3-1/

It does not reference a part number change but maybe they did any way.