Chris, with regard to your comment about holding the tank in a collision I have heard people worry about it not only coming away from the bike, but also having the pegs tearing holes in the tank or some such.
A couple years ago I had the unenviable opportunity to test the performance of the bike in a crash caused by being rear ended by a car going 75mph while I was doing about 40mph.
The results were that the bike was thrown over 100 feet, and tumbling, as witnessed by the debris field and the damage. The severity of the impact was witnessed by the 2 foot deep indent in the front of the KIA that hit me.
At the time of the assault, the tank had approximately 4 gallons of fuel in it. At some point in the tumbling, the tank separated from the bike along with the seat, and the bodywork. Both of the pegs that hold the rear of the tank had their welds fail allowing the tank to leave the bike. The fuel lines failed at the hose clamps, one at the rail, and the other just below where it enters the tank. The electrical connections broke where they entered the tank.
Despite being pretty beat up, the tank held all it's fuel and did not leak. The welded pegs appeared to be designed to breakaway without tearing the surrounding sheet metal of the tank. They stayed in the rubber grommets in the frame where they were held by the C-clips.