I am finishing up my second boat. This one I built a little smaller with different needs. I have a question as I am starting to think about my 3rd boat. I had to build this boat out of 1/4" Birch. It was the best wood I could find that was thin. It ended up being 3/16" and weighed 23lbs a sheet. I only have well known department lumber stores close and can't find 1/8" plywood but like the look of Birch. Is the 1/8" Luan or Okame (sp) that much lighter than the Birch I used?