Ok, its been several weeks and almost a month since I started using these pedals. Last night, I got so frustrated, I unplugged them and put them on the shelf. I've tried everything. I think I just have a heavy foot or something.
The final straw was when I went into a spin and crashed (could not recover no matter what I did) during a routine fight (something I hardly ever did before I started using the pedals). Maybe I'll dig them up in a few months and try again but my frustration level is getting to a boiling point.
The spin/crash just sounds like over or improper controlling. That's something that will go away if you work at it. The pedals give you a more "pure" control of the rudder, so should actually improve your control once you figure them out.
Until then, I think the only cure will be to just work at it. Shelving them won't help, it'll just prolong the agony.
The easiest way to figure the pedals out, and make spin recovery "automatic" would probably be some time in the TA, purposely spinning and recovering. Overuse of the rudder often causes spins, especially at low speeds, so that's something to think about too. Are you spinning more now, than you were pre-pedals? That would lead me to believe you're over-using the rudder...
Get up nice and high, and spin it. Learn what the rudder does to "help" you (or cause you) to spin. That's what you want to avoid normally. Learn to recognize the signs of the spin before it occurs, so you don't push too far in a fight. And learn to recover quickly. Pay attention to how long (or how many revolutions) it takes for you to recover, and try to improve on that.