A friend was wanting to buy a limb saw and knew that I had a MS250, So he calls me wanting to know what i thought about the saw. The one he is looking at has the old style screw on fuel and oil caps. All my saws have the newer floppy caps so this got me to wondering when the floppy caps were introduced. Is it possable to roughly date a saw by what kind of caps it has? What year, when were the newer floppy caps introduced? David.