Thanks JONA and Charliebear, for your replies. Your information has helped me make my decision, though it will require more perspiration. Since I would prefer a healthy scion, space is tight, and I don't want to lose any more time than I have to before making a tasty Meyers Lemon lemonade, I'm taking that stump and shoot out, and planting a "newbie."
I'm in CA, zone 10, so just barely keeping my plants alive with watering. With hopes of heavy winter rains this winter, my new member of the (small) grove will have to wait until Spring.