I had a friend who asked me to buy him some Bitcoin when it flew through 10k USD and I did. He is a bit of a hermit that doesn't trust any corporation (wallet apps etc). He doesn't have a PC and he asked if I could make him a Bitcoin address with my Core client, dump his paid share into it and pass on an encrypted copy of the private key. I said no worries at the time. Now a potential fork is upcoming I want to get it into his own address. I've poked around the core client and I'm a bit worried whether I can do this. It is just as simple as creating a new receiving address, send his funds to that address and then retrieve the private key at console? Can I then disconnect this receiving account from my client, even with funds in it? and will this cause any on chain issues with him accessing it later with his private key? Any advice would be appreciated. Cheers.