thoughts on variances in needle sizes

I recently got a set of Clover bamboo DPNs in a size 0 in the mail. I was planning to use these to start the second sock of the pair I am working on, so as to not forget how I did the toe and to avoid possible Second Sock Syndrome.

So the needles arrived and I decided to compare them to the current needles, which are a set of gold toned Susan Bates size 0's from the sock set of needles. And my findings?

The bamboo are a hair bigger around than the Susan Bates ones. So then I pulled out one of the KnitPicks DPNs in a size 0 (these are for the person who is receiving the socks I am currently making), and those... they are a hair smaller than the SB needles.

This wouldn't annoy me so much if I had started with a good pair of needles, but even with my set of 5 SB needles, there are inconsistancies in size - two of them are pointier than the other three, and two (not necessarily the two pointier ones) feel smaller in my hands.

I am seriously contemplating trekking to the one LYS to see if they have Addi size 0's, but do I really need three sets of DPNs in a size 0?

The smallness of the bamboo ones freaks me out too. I expect to break at least two of them the first time I do decide to use them.

And even worse than all this? I realized the other day that the needle case I made for my DPNs doesn't have a slot (or slots) for anything smaller than a 1. I wonder if I can tweak it a little, make the size 1 and 2 slots a little narrower to squeeze in a third slot for the smaller than size 1's. Unfortnately, the sizes are written on in silver pen. And I don't think it'll come off.