I think all my apricot scions were smaller than a pencil-thick size, some were quite slim. I couldn’t do splice because that technique needs a good match of scion sizes. I’ve done all my apricots with cleft graft. Bark graft is not possible with bark does not slip well.
This is the 3rd year grafting apricots. Fortunately, the take rate is in the 90%. This year, I only grafted 3-4 apricots. So far, they all look good but I don’t want to jink it!!! . .