Appreciate all who responded!
As an update: I ended up finding a couple of KC pros with a matching wing (non-rounded) to my DX's. Both 180g max weight, complete twins, same color of a light turquoise. Both started out at a sturdy 4/5/0/2, absolutely zero turn and a stern sweeping push left at the end. After thrashing one for a week (forehand rollers when walking the dog, nailing trees, tomahawks to the next tee pad on every hole, putting practice) I got it to what I'd consider a "2.5 roc". 4/5/0/.5 would be my numbers for it, but when you really crank on it with a slight anhyzer it holds it all the way to the ground.
Couple notes: it did wear in exactly like my DX roc did flight wise, but not as quickly. Laser beam straight, doesn't want to turn, just helicopters down without much of any change to the roll angle as it loses speed. Holds hyzers, holds anhyzers. I throw my distance drivers non-internet golf line 450 and gave this one all I could and it just didn't turn and didn't fade, held the angle its whole flight.
The dome actually slightly lowered during the process; both started out with an identical large dome (if you look up KC Rocs on OTB's site and look at the ones with a "5" for dome, that's what they are) but the one that's beaten in has lost 10-15% of its total dome height. Still domey, but interesting that it happened. I looked at my DX that's also beaten in and the same thing happened to it.
The plastic gets to the really tasty "worked in KC" feeling with more FH rollers/flight plate slides on grass and a few leave-in-the-hot-car heat cycles within a week.