In reply to GridNorth:
Here's my pennyworth:
Standard rack for longish pitches at my grade (HVS/E1):
Racking krab 1: Rocks 7, 8, 9, 10
Racking krab 2: Rocks 5, 6, 7, 8, 9
Racking krab 3: Rocks 3, 4, 5, 6 + gold and blue DMM offsets (= Rock 4 and 5 approx)
Racking krab 4: Rocks 1, 2, 3, 4 + DMM brass offsets 4, 5, 6 (= Rock 1,2,3 approx.)
Racking krab 5: Hexcentric 5, 6, 7 (once on tape, now replaced with Dyneema cord)
Racking krab 6: Friends 0, 0.5, 1
Racking krab 7: Friends 1.5, 2.5
Racking krab 8: Friend 3.5
20cm QDs x 2
30cm QDs x 6
60cm slingdraws/alpine draws x 4
120cm slings with Phantom screwgate x 2
Belay plate + large screwgate
Large loose screwgate for bringing ropes back from anchor to harness.
Racking krab + 2 short prussics.
For gritstone I remove 2 slingdraws and 2 x 30cm QDs and add Friends 2 and 3 on one racker. Sometimes also replace some long QDs with shorter.
For routes that require them I add a Friend 4 or DMM Brass offsets 2 and 3.
For very long well-protected pitches I add 2 QDs
So you see I'm in the screwgate camp for belay anchors (the first two anyway - the rest go on single snaps) and I like to rack my nuts with overlaps. Until this year I had 3 sets of Rocks 3,4,5 and 2 sets of 1,2 and 6 - 9. But I replaced with DMM offsets as above. I've not found the need for larger offsets as the larger Rocks sideways do the same job for me. Never used Wallnuts - always seemed a bit fiddly.
Martin