I'm beginning to think that in the effort to sell more gear and more books and more stuff, Crevasse Rescue, like a lot of climbing, has become overly complicated and messy. My own crevasse rescue has become more and more minimalist in the last five years. Earlier this summer I proved that my system works just fine during a practice session when I was able to catch, anchor, and haul someone out of a hole in less than 15 minutes - with only a snow picket, and each climber carrying two locking carabiners, two non-locking carabiners, one sling, and one cordellette.
Inspired by these three panels that I sketched up last year for a Mt Baker Basic Mountaineering Course, I'm now writing an extremely short eBook on the idea of a simple Basic Crevasse Rescue system, which I hope to have done by winter. If you have any follow up questions, contact me!