OK, I think I understand, but just to be 100% clear you're saying if I move my BTC from BitcoinCore to a new wallet, im then free to export the private keys on the old wallet without any risk?
Yes and this was announced by theymos already sometime ago.
Like what bitmover said and lucius, you are fine if you send first to another wallet and empty the wallet that you are about to export the keys for the retrieval of fork coins.