The weather finally lifted enough and we headed out. Other than flying centerline, the "Buck" handled like a Swift, no surprises there. But about 15 minutes into the flight I began to smell gasoline. I radioed the others and suggested we stop at the next airport to take a look. It took about five minutes to get into the pattern at Cartersville, and by then the smell was strong, making me sick. I opened the canopy and stuck my hand out to direct fresh air onto my face. The landing was uneventful, and we removed the panels and conducted a thorough search that revealed only a "not really loose" nut on a gas line. Meanwhile the weather had started going down again. So we got back in the air and on our way. Just short of Athens the weather took another turn and plunged into the ground. By now it was getting late, and the only option was to backtrack to Dalton and start again in the morning. The next morning was beautiful. With one day left to get to Oshkosh, we grabbed our gear and headed for Wisconsin.