Swampstander, you're missing a few measurements. You are most definitely short on both main beams. I'd guess your measurements are short bysix to seven inches. And you're also not giving the buck credit for his last two circumferences. My guess is that because he is only eight points you are under the assumption that he is only credited for six circumference measurements. But, there is another circumference measurement that needs to be taken halfway between the G3 and the end of the main beam.