For my first remix I found the ice axe and back pack so wanted to have crampons for my Dummies. I remixed the big feet and added spikes in Blender. They are a bit thin and the tips are fragile but they look pretty good in action. 

I printed with support and the spikes up. Two versions are solid and one has 2 front points and the other 4, the others are 2 piece and 4 front points.

Blender file included so you can play.