It's quite simple. Why did it not catch on? I know the Edge and Liberties are both staught bars but the Delta was good looking and was fairly effective. I have a soft side for rotors and for me the Delta ranked highly compared to Vistas and Mx7000 models from it's main competitors. Was it to late at the time would have it succeeded in the nineties or was it simply not desired by Whelen's core clientele? I won't to hear more about this secret gem.