OK, so I installed the clips tonight and it doesn't work the way Tom says :eek:.
It turns out that you can't physically use the taller clips anywhere but in the lower run below the windshield and only in the center section (the ones at the end by the A-pillar require use of the shorter clips-one on each end in my case) and the shorter ones have to be used on the A-pillars and across the top (the taller ones would stick way out of the channel).
Live and learn, The trim won't get installed for a month or so and I will report how it all worked at that point.