That is pretty cool and looks like it would work well.

I carry a specific knife in my pack for this that works almost as well. I carry a small 4" rapala fillet knife in the pack and you can cut around so easily with this knifeand not run into bone, then once cut around you simply grab it and pull it out a bit, then put a twist tie around the end and then pull it back through and into the body cavity and out with the gut pile. I have coined this as my "Corn Hole" knife........haha.