I never liked the look of ribs showing on the HS, VS, elevators, ailerons, flaps and wing tip trailing edge.
I used a piece of ridged foam in each end rib, the foam perhaps 1/8" smaller than the rib. The foam is put in with some micro balloons just to hold it for the next step. I did a 4 bid layup that goes over the foam and edges tuck in the 1/8" space between the foam and skin. Leave the glass just below the flush level of the skin. After set, a couple of skim coats of micro on top of the glass then sand flush.
I use a small straw on the trailing end to leave a 1/8" hole for water to drain out.
Carl