Just a follow-up note on my AAA balsa sheets, which came in today, 100 sheets averaging 10.24 lbs/cu.ft. This was described on their website as '8 lbs and up'. So that is better than the almost 14 lbs/cu.ft. sheeting that came in the kit, but a long way from contest balsa. Other than being a bit heavier than I was hoping for, it's nice wood, clear, regular grain. I'm sure it will all find a good use somewhere. Now I have to find a little gram scale somewhere to weigh and sort the individual sheets.