In reply to athy:
I have one crab of tiny nuts for when I'm really scared/desparate for placements.
Then (more or less) 2 full sets of nuts on separate krabs, one on each side. This means:
a) If I drop one krab then it's not the end of the world
b) If you're placing gear with only one free hand then you don't have to reach around yourself to get a krab off the opposite side of your harness
c) If I go climbing on grit or something else small I only need to take one krab rather than faff about pulling a single set off 2 or 3 other krabs
d) I have problems with racking lots of similar sized nuts together as this means that if you try one and it's just too small/big, it's harder to identify which is the next size up/down (when I'm afraid my ability to read the numbers usually gets impaired for some reason)
Victim of Mathematics