I will be installing either a Woodstock Fireveiw or Keystone this summer. I scored a bunch of free cut wood. I'm going to start splitting and stacking it tomorrow. The Woodstock specs say 16" max length. I have read here that 18" will fit. Woodstock owners please share your knowledge. Some of the rounds I'm getting are kinda long and I'd rather cut them now, when splitting than next winter when I'm burning. What is a good length? Can I go a little long with them? I have to decide if I'm gonna have some 12" or so wood or some 16"-18" with a bunch of little cut offs to burn in the little stove we use outside in the summer.