I too wish my Gitzos had spiked feet. While the Markins ones might help on ice, I'd prefer bigger, surveyor style leg spikes. In fact I use a surveyor tripod when out in the muck. These are wide diameter spikes about 4 inches long. When you sink these in the turf, your tripod become very secure and well damped. (At one time I had a Zone VI tripod which had great spiked feet, but it was heavy as sin.) In any case, I've been contemplating clamping similar spikes to the bottom of my Gitzo. I may simply steal the spikes from my surveyor tripod, or perhaps I'll fashion something. I need to some up with a way that allows the spikes to easily and securely attach to the bottom of the tripod tubes. If anyone has any ideas, I'd appreciate it.