They changed twice, original were dark, then light with same markings, like 3 years ago they changed the logo. I asked if the spine changed and the answer was no (think Big Jim said no change, he doesn't sell 3rd generation that I can find, maybe guys didn't like the larger logo)150's are 500250's are 400I still have around 20 2nd generations and have not gone to third yet, seems every time I find a carbon shaft it changes or is discontinued
all mine are from around 1998,, I hope they didn't change too much... if they did are they weaker or stiffer?