Hi Larry,

You're right. Both the time labels and the cross-marks are
added relative to the start of the trail, not shifted as they
ought to be. The behavior I intended would be that you'd see
labels at 9:00, 10:00, etc. (I _didn't_ intend for Guide to
provide labels at 8:30, 9:30, 10:30, etc.)

I think I've just fixed it to work as I intended. (Note that
I say "I think". I still want to check for unintended consequences,
such as "yes, it _is_ fixed for one-hour steps, or fifteen-minute
ones, but does strange things for thirteen-minute steps.") You
should see the fix the next time I post an update. Thanks for
pointing out this bug.

-- Bill