Jeff,
I can't wait for you to get your bow and run some numbers. That's what makes these message boards so nice is that people are sharing their results with others.

Please let us know what you think about the draw curve as well as the speed with 80/29.
I keep wavering between the Pro 40 dually in a 70/29 and the liberty in an 80/29!!!! I am interested in better accuracy, but don't want to give up the speed and KE. What to do? What to do?
As far as arrows go, with my dually I am currently shooting 28.75" ACC 3-60 arrows with 4" vanes and 125gr point to get about 445 gr. overall arrow weight. You must be using 100 gr. points on the 3-71s to get 450. Is your FOC OK?