Finally managed to pop down a Graff!
1lb light dry malt
1lb amber dry malt
6oz crystal 40°L
6oz crystal 80°L
2oz flaked wheat
0.5oz Motueka @ 30 minutes
0.5oz Motueka @ flameout, 10 minute steep
1/2 tsp Wyeast Beer Nutrient
4L 'No Name' frozen concentrated apple juice (equivalent to 16L reconstituted juice)
21L final volume, OG 1.048
US-05 rehydrated then pitched @ 19°C
Brewing at 18-19°C ambient, very thin bubble layer @ 12 hours
My process was a little unusual, but seemed to work OK. Steep was 4L, sparge 1L, and I kept the boil at 5L volume with all the malt Beersmith tells me this should give me 7-8 IBU, which is right on target for this sort of brew. I also pasteurised the juice concentrate in a separate pot @ 95°C for 15 minutes. This worked out great, because I could cool both pots separately and quickly in my double sink.