hi Ross
i agree with Jow, however, my reason for not candle prune would be the vigour of the tree, or the slight lack of it. most of us are all obsessed with this summer candle prune to get a second flush with shorter needles and shorter internotes by watching Ryan Neil's youtube clips and hearing him last at the Canberra convention. but i always remember him saying at the very beginning: "assuming the tree is healthy". and looking at your tree Ross, i would not prune this year's first growth off otherwise the tree would only have a few older needles left from last year, which will set your tree back another year to catch up.
i would continue to feed the tree now because the objective for this tree is not shorter needles and internotes, but build up the strength and vigour for next growing season. i would love to see the tree with longer needles and a bit "messy" for the next few months, for you know that the tree will be ready somewhat next Spring to apply the principles of what Ryan taught us.
regards
Tien