Not sure myself, TxCajun, but the "very early" Gen 1 hammer is different from the supposedly later Gen 1 I was sent originally--but you gotta look real close to see the difference.
UPDATE: Just got off the phone with KT CS, and was asked to send the pistol in. Lady said they would probably need to replace the frame, but they would rebuild the gun as a Gen 1, so I get to keep my slide with the nice rounded edges and the better (I think) extractor. Hope they don't give me a hard time about the barrel, which I modified to eliminate those infamous smiles.
Told the lady up front that I am the original owner but cannot prove it as the paperwork was lost at some point. I'm sure the ATF has the records of the defunct dealer I purchased it from, but I'm not going there. She said KT would "probably" repair the pistol under warranty.
Even if I have to pay something, if the price is substantially lower than what a new pistol would cost, I'll be ecstatic. Stay tuned.