Re: Question for Dave D
robj, sorry, I had forgotten about the original name. The plastic didn't change. There were variations then and there are variations now. The ProLine now is just the JK Aviar, KC Aviar, KC Roc, Pro Rhyno, and Pro Whippet. The discs you saw are probably over a year old.
By far, the most important part of any shot is what is happening in the last split second as the disc is pulling itself from your grip. Focus there. It's the key.