Nice story Dotd! I've heard a lot of great things about the NWA's and yours looks like a beaut. I just hacked my SOD through a downed cedar this weekend and it did well. The SOD really wants to chop and I think that is the task that it does best given the way it is balanced. Maybe I'm funny, but that doesn't look like a birch tree that you are taking down....As long as it is hardwood! Cool shelter that your friends son is making.