I only use very very strong Q+ colonies, and just a couple of queen excluders (demaree) the top one framed on three sides, top and bottom entrance, both facing same way, no fancy boards of any type, these same colonies produce a succession of cells throughout the queen rearing season, and can produce sealed cells for removal to a incubator every six days, or left in a bit longer if desired.
Grafting is done with a small sable brush, usually done sat in the front of the truck cos it's raining, if fine, on the tailgate.
My average take on the grafts is 90%.
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