I enjoyed your tools articles. It's worth noting that Cliff Jacobson is a canoe guide, both northern Minnesotan lakes and Canadian rivers, and for him weight is a secondary consideration as he only carries his gear on protages. Many of his river trips are multi week trips in remote areas requiring bush pilots for pick up and drop off and consequently he needs to be equipped for emergency emergency repairs to a canoe hull while in the bush. If you punch a hole in the hull of a canoe with 10 days left to paddle, duct tape isn't going to do the job. Also, in regard situations. His repair kit is designed such that he can make to tools, Jacobson is canoeing in forested areas where there is plenty of wood for fire building. By contrast, these tools would not be needed in an alpine environment.