Kahtoola has 2 sizes for the KTS. Small/medium and medium/large, with both fitting a size 9. I usually wear a size 9 in the winter. I went with the larger size and am glad I did. The difference in length is adjusted by a sliding leaf spring that connects the step with the heel. In my case, it could be cut some to shave some weight. It's good to have extra length for larger winter shoes.
I went with the steel, I could see myself wearing down the aluminum. Not a lot of difference in weight. There's not much to them.
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Now I suppose an ice axe is in order. The BD Falcon or the Falcon Pro both look to be good choices. According to the REI guide I should have one about 70cm.
I think I would prefer a Petzl. I have poles for walking and I prefer the curved handle on the Petzls. Defiantly not 70 centimeters either. There's cheaper axes out there as well that may fit the bill. It will rarely be used and I'm not ice climbing, but it is safety equipment and needs to be good quality. Just looking for input.