Another question for Dave D:

The early edition "flat-top" JK-Pro Valkyrie was an incredible disc (the ones that were more translucent than truly opaque right around 171); it was a favorite for me for a long time. I've moved to more over-stable discs since then, but I still find that almost every beginner I know can wing the hell out of this disc, and a good many more experience players that I introduced to this disc still cling to their one driver mutterring about "my precious".

What would it take to get you to produce more of this disc: soft, grippy, flat, fast....
I'm just asking because I know 3 players locally that save money and scour e-bay for the disc (laregly to no avail). It's gotten harder to find than an early-run FX....