Update....
I wasn't 100% content with the first seat pan, so I decided to do another (since I had all the materials and everything set up).
The first pan (with front wings) i did about 5 layers, in this order:
1. cloth (woven) precut for hardware
2. mat (unwoven) precut for hardware
3. mat reinforcement, down the center overlapping the hardware locations precut for hardware
4. nuts installed
5. mat precut for hardware
6. cloth precut for hardware
Close-up of the front hardware inserts from the first pan

Tank-tab made out of 3/16 kydex sheet (heat-formed)

The first seemed to get pretty messy with the unwoven fiberglass mat. I figured I could get the same amount of strength by alternating directions of the weave. So, I did the second pan (no wings) in this order:
1. cloth sheet, precut for hardware
2. cloth panels under seat locations for 2 riders
3. hardware reinforcement
4. cloth sheet, precut for hardware
5. harringbone pattern strips of cloth, entire length
6. hardware reinforcement
7. hardware installed
8. cloth sheet, precut for hardware
9. 2nd cloth panels under seat locations for 2 riders
10. last hardware reinforcement
11. final cloth sheet

I modified my Kydex tab piece for the second pan. Used 1/8 inch with the holes length-wise. I also modified the pan shape a bit, tapering it down to the frame making the shape a tad stronger.
Another note, in order to stretch my fiberglassing time (doing it solo), I put 40 drops of hardener into four 8oz cups, pre-marked at 4oz (recommended 10 drops of hardener per 1oz of resin). This way all i had to do was dump the resin in up to the line and mix with a popsicle stick. I also had some extra pairs of gloves and trimmed-down brushes standing by for when they got gummed up. All said and done, i used about 16 oz of resin, 2 brushes, and about 3 pairs of gloves per pan.