Update:
First off adding the 1" PVC pipe inside the scupper holes has really helped alot, the scupper holes are now much stronger. However I noticed that during the time it takes me to rig the boat at the shoreline, add all the gear, add the AMA's, do up the tramps, and get everything ready for launch (sometimes 20 minutes or so, getting everything ready) the wheels are noticably closer to the bottom of the boat hull, especially on a hot day, actually when I first tip the empty boat onto the wheels, there is about a 1 to 1 1/2 inch gap between the tops of the wheels and the bottom of the boat hull. By the time I get the loaded boat in the water, the wheels are almost touching the hull (that can't be good). Well I went to Home Depot and bought some 1/8 X 2" aluminum (18" long), I drilled two 1" holes 11 inches apart, and a quart of Bondo body putty (about $15 total). I then taped wax paper to the bottom of the boat and filled the gap between the bottom of the boat and the aluminum with bondo. Below is a pic of the finished product, seems to work great, and distributes the load over a much larger area. In addition to this, I also took a look inside the hull to see what can be done to make that stronger in the area around the scupper holes. Well it turns out Hobie has a big block of floation foam right over the center of the scuppers (how convienent). However the foam has a gap at the top of around 1 inch so it's not doing anything structurally. Well I fixed that, I took some 1 inch foam (about the same hardness as the floatation foam) that I had in the garage, and stuffed the 4 inch wide by 9 inch long piece over the existing foam (between the center scuppers), it was easily reached from the rear seat hatch. I then took some 1/4 inch aluminum rod I had (about 3 ft long), and from the front seat hatch I pushed the rod in along the center line of the boat all the way back intil it hit the rear mirage drive (along the top of the exiting foam, but under the new recently added piece), I then put another piece of one inch foam under the front seat (basically jamming the 1/4 inch alum rod against the top of the hobie flotation foam block). What this does is makes the entire 3 ft long hobie floatation foam piece a structural re-enforcement for the bottom of the hull, only adding a few ounces of weight to the boat, and it's in an unused area (under the front seat back to the rear mirage, is now a structural bulkhead ( LOL)). The next bit is optional, I had some crazy foam sitting around, so I filled the little space between the scupper posts and the front of the rear mirage drive with rigid crazy foam, it was easily reached from the rear hatch, I'm not sure it going to do anything but it's in there now. Here is the final modified trax cart ( with the new better poly-urethane tires, and the "bondo cart brace"). Everything took around two hours to complete. Bob