Update.  Just took a look at the van.  In fact the snaps are on the top (on
the sliding door track) only with velcro all the way down the front side
and velcro down to the bench on the rear.

On Thu, Aug 27, 2020 at 1:14 PM Geoffrey Toye <geoffreytoye@gmail.com>
wrote:

> I have an '81 Westie (with the quiet close rear handle) and the sliding
> door screen is attached by snaps on the upper half and velcro on the bottom
> half.  Seems to work well.  The velco I think is a more bug resistant seal
> to the van than the snaps but the upper snaps do support the weight.  Not
> sure if all velcro would work because of the weight.  Put in by a previous
> owner.
>
> GT
>