Thanks to everybody for advice and links. I can see this is going to be a learning experience! Looking up 'cloak board' I found what seems to be a useful illustration of the principles of grafting to starter cups (this might be US terminology) at:
http://uk.wrs.yahoo.com/_ylt=A03uv8...w.westsoundbees.org/newsletters/June_2009.pdf
The way it seems to be coming together in my mind is: graft day-old larvae from selected colonies into (15-20) queen cups and place in previously queen-separated nursury hive until capped. Then shift each queen cell into either a mini nuc or ordinary 5-frame nuc with supplies & house bees to mate and establish. (A mini-nuc system would need a source of drawn and pre-loaded comb?)
Is that a reasonable outline?
Reasonable yes but not practical. There is no slack in there for failure, and failures there will be.
The major factor that never seems to be discussed when grafting and so on are discussed is our old friend Mother Nature.
I once grafted every day for two weeks and got nothing, it was cold wet and raining. the first day the weather changed I had 32 accpeptances from 36, something I have never got near since.
When discussing queen rearing, it is not an arithmetical model where one and one makes two, some times it does but................that assumes the one actually exists. Just a wee heads up.
PH