Here's one for the archives, so you don't have to do what I did and
waste $2.92 at your local hardware store:

In my '86 weekender, there is a factory installed screw at the aft end
of the sliding door panel, to keep the retaining clips in that area from
popping out and causing panel damage when the door is slid open.  This
screw was missing on my door, so I went to Home Depot and got some sheet
metal screw / washer combos in a number of different sizes.  After a
couple of different tries, I found that a #8 x 1/2" screw works nicely.

OK, so it's not great info compared to the many pearls I've received so
far from this list, but at least for now, it's all I can offer...