In reply to treforsouthwell and others: A few thoughts specifically about wires:
I generally climb with the fairly standard arrangement of three krabs of wires - SMALL, MEDIUM and LARGE.
[FWIW, this generally includes a full set of DMM Wallnut and DMM Alloy Offsets, some larger WC Superlight Rocks and DMM Peanuts, plus a larger hex (WC Rockcentric 6) on wire.]
- My micro wires (DMM Brass Offsets) are on a separate small accessory krab, but quite frankly I rarely carry them unless on very particular routes or rock types. They don't weigh much but I find harness space is always at a bit of a premium so I find the common justification of carrying them 'just in case' rather unconvincing.
- I much prefer climbing with my Alloy Offsets mixed in with the rest.
- I also much prefer everything ordered by size. The argument of having a full size range on two or more krabs
for UK rock climbing has always struck me as bogus, if not verging on slightly pretentious.
- I do NOT like the large Wild Country Rocks (sizes 12-14) so I generally carry a wired hex in that range instead (and rarely carry any other hexes on tape/cord when rock climbing).
I'm normally fairly relaxed about climbing on partners' racks but there are a couple of things I really don't like:
- Krabs with too many wires. With medium/large wires, more than 8 starts to prove awkward.
- Small wiregates as racking krabs. I'm not too fussy and there are various styles of krab that work well but a tiny minority seem to make really strange choices.