Hi,
I agree with most of the above. I'd say ditch the Gravol (what IS it?). Carry only enough meds to get you home, and for goodness sake, you don't need anywhere near that much tylenol usually. IMHO, you don't need the back pain or cold&flu versions, but it's your kit. Pick one, or none, of the first aid books, since are you really going to be looking up how to help someone in the heat of the moment? Trauma shears fit nicely between your belt and pants, stuffed through a belt loop. BTW, shears come in a large and small size. Ditch the Wet Ones. Replace the tube of polysporin with 1 or 2 of the individual use packets. Ditto the 2x2 for 4x4. Ace wrap, triangle, and trauma bandage and you're set (or a few heavy-flow menstrual pads).

I'd consider a soft case anyway, unless you're over water a lot. Most ambulances and SAR teams carry their kits in heavy duty cordura nylon, and most of the FAK items are pretty soft.