Using a wing jig brings out its own set of requirements. Getting the ribs lined up with them above the plans required a little thought. There were slight deviations in the rib leading and trailing ends. Not enough to cause concern. Just not meeting the leading and trailing edge without a gap here and there.
Bluejay showed the sheeting being attached over a square trailing edge. That creates a triangle gap that just seemed wrong. Thus the tape to prevent sanding into the rib.
mo lata
Jerry