I'm afraid that's typical for springers, Martin. And some are MUCH worse than the CFX. That said, a tune might help. Properly done, a tune will eliminate spring torque, so all the recoil is essentially in a straigt line. And yes, Bob definitely knows how to do them properly :-)! You also need to keep in mind the velocity difference between your CFX and your old pumpers. Don't know about the 66, but the 1377 in stock form is maxed at about 600 fps. Depending on pellet, the CFX is 800 to 900 fps. So that probably has something to do with it. Shooting my Talon SS with a .22 barrel, I'm shooting high 700's to low 800's right now, and I'm not seeing the pellets. That could just be my eyes and slow brain :-), but I think there's a point where they just don't register, unless you're actually looking for them. I'll pay attention the next time I shoot the Talon. Since he's only 15 minutes away (you lucky dog!), I'd have Bob tune it. You won't be sorry! Good luck!
Dave
Just saw Jeff's response. He's not the only one that likes the foam, it's an excellent suggestion. If you want more weight, you can use Duct Seal, I put a pound or so in the butt of my CFX's. It's available at any electrical supply source.