Thanks phimdel and Brother Dave.
Finger "spring" and a slight spin from the thumb and pointer finger should put the disc on a better trajectory. Right now my knuckleball push release is just flappin in the wind. Heck, i think the disc even flipped upside down on a couple I tried last night.
Today I'll try the finger push / spring and see how it goes. For one thing I'm already committed to using and keeping this style of putting. The idea of releasing in this fashion instead of a spin throw has to be dramatically more consistent and on target.