FordGuy, I took a one day course on grafting with my Asian instructor that taught my initial beekeeping course. It is not really that hard, but one must pay special attention during the grafting process. The larvae must be no older than 18 hours (well it can be, but after that time the quality of the queen produced diminishes). The younger the larvae is, the more royal jelly it has a chance to be fed and that produces superior queens.
When we were grafting the larvae, the larvae was not even really visible to the naked eye. If the larvae was clearly visible, it was too old for good use.
It seemed to me that when we were grafting, that the cell that had the royal jelly in it without a visible larva was the one to choose. That larvae would have just hatched from the egg and would be not very visible, just looked liked a shiny blob of royal jelly.
Do some research, leaning on the links that are and will be given here from forum friends. Good luck, you will have some interesting times with grafting. We used the Chinese grafting tool.
Keeping the tool moist is important, this may sound gross, but actually was not nor do I really think it is. I would put the tip of the grafting tool in my mouth after each grafting to keep it moist so as not to have a dry tool tip scooping up royal jelly. There is quite a technique to it, I never quite got that technique down pat, and when we had a test to see how many of 25 were capped by the bees, I only had 2. That is terrrible results. So you see, I really and desperately need to hone my grafting techniques, I was not really that good at it and freely admit it. Have the best of a wonderful day, love this life. Cindi