I'm not sure how anyone keeps up with all this stuff. Thanks, I found it towards the bottom of your link. If I read this correctly, just about any 69 can have this strap. In that case I think I'll add it. Seems like a good idea.
The date of a revision almost never indicates the date the change actually took place on the line; it just shows when the sheet was revised, which could have been well ahead of or well after the part change occurred in production at the assembly plant.