I've got a Meyer Lemon, a Key Lime, and a Citrus rootstock. When I bought the rootstock, it had a navel orange twig grafted onto the top, but the twig didn't make it and the rootstock sprouted new branches below the graft. I'm going to prune both the lemon and lime before I bring them inside for the winter, so I'll have some new twigs I could graft onto the rootstock. The branches on the rootstock are a little under half an inch in diameter.
I've read some articles on citrus grafting, but I've never actually done it before. Do any of you have any advice? A technique that reliably works for you? A grafting product (wax, tape, etc.) you can recommend? How about any gotchas I need to avoid?