But JJ - the waypoint file for Williams on the Soaring Turnpoint
Exchange for the SN10 *does* have Ruth marked with an "L" attribute.
So why did it not show up for you? If you have been hand-editing the
file and removing the "L" or not working with the Turnpoint Exchange
SN10 file as a starting point then ya kinda burnt yourself (even if
the behavior is a bad design decision)

Yeah, I didn't like the Williams file, so I made up my own where an
airport is given an 'A' designator. That tells me to be looking for a
large complex as apposed to something with an 'L' which might be a
duster strip that looks more like a road. All (most) of these files
are based on Cambride where an A or L will do the same
thing.............see my proposed new Williams file where every
possible landing spot is given a big 'L'.
Cheers,
JJ