Re: K-10s
For leading an AMC group up Moriah via the CMT (another classic, abundant source of black and blue ice floes on ledges), I chose my Hillsounds (original). They performed better than the MicroSpikes in the group as I expected, but did slip on occasion on the steepest ice. Then, shortly after beginning the descent, they broke a chain (common problem). Rather than bother with a field repair (veteran here) I decided to whip out a brand-new set of K-10's instead, for their maiden voyage. My impressions...
* In walking straight down the center of every ice floe (pretty much all of the upper half of the trail and various stretches of the lower half) there was not a single slip. I was amazed. In a few places, out of fear/habit/[brain]muscle memory I did seek out some veggie holds, but in each case this proved unnecessary.
* In general when I switch to full crampons on bony terrain, they give me a rough, unstable ride. It's the inevitable consequence of the geometry of walking on long spikes. With K-10's, the ride was smooth (zero ankle/foot strain) and completely stable -- someone evidently paid a lot of attention to determining just how long a spike you can have for a given width and still be stable!
* As was mentioned, it took a little bit of practice with the buckles to get a tight fit. With that skill under my belt, it's amazing how much faster I can put on the K-10's than I can my B-D Sabreteeth!
* At their widest (near each foot's 'knuckles'), the points are just over 3" apart, and about 1/4" in from the outer perimeter; this could make for a dog issue, but note this: there is only an issue with about 1" of the K-10's length. In contrast with that 1" of danger potential, *all* 25" (or 30" or 36") of a Lightning pose a danger -- i.e., the K-10s pose [very] roughly 25x less risk than Lightnings.
* Time will tell how often these will require sharpening, but as of the maiden voyage: WOW. Keeper.
Post note: After managing to deal with the aforementioned Moriah hike wearing just Hillsound Ultra's (smaller than even MicroSpikes) and watching me in the K-10's, my fellow leader went and snagged a set of Hillsound PRO's, and he loves them - great traction and an interesting ratchet mechanism for tightening. In terms of aggressiveness and stability characteristics, these are a notch closer to full crampons.
Alex