Hi Ham

Some of your questions on making cell cups are answered on...
http://website.lineone.net/~dave.cushman/grafting.html
It is 'fun' providing you are making smallish quantities.

Choosing larvae is something you get used to... the ideal is just as the
skin of the egg dissolves, something the size of an egg, but slightly "C"
shaped. If it is fully "C" shaped it is older than ideal, but will still be
used by the bees to raise a queen.

You prepare your cell frame in advance and put it in the nuc the day before
you are going to graft. Then on grafting day you simply put the frame back
in the nuc. If there is a long distance between where you graft and the nuc,
particularly if the sun is strong, then wrap a damp towel around the frame
whilst you are carrying it.

Best Regards & 73s... Dave Cushman, G8MZY
Beekeeping & Bee Breeding Website...
http://website.lineone.net/~dave.cushman