I was talking to a friend yesterday about firewood and a question came up as to what part of the tree was better to burn branch or trunk. I told him that i wasnt sure and that I would think that the trunk is much denser but I wasnt certain. I recently got a nice oak score and being an old tree the trunk pieces are really heavy so I have been taking mostly large branches, ( 8 or 9 inch diameter). So does it matter which part is used, is one better than the other? thanks.