My upper girth measurement is 5.65 feet and mid-girth 8.83 feet (2691 mm). Mid-girth exceeds class rules by only a few inches . Compared to my old ODR sail, it is significantly fatter in the upper girth though.

David, it is very likely that most of the increased performance I saw was due to a flatter shape. I do know that with the main sail alone there is significantly more heel in the sail even when flattened than my old bagged sail. Maybe my butt power meter is lying to me. I still am interested though, what others think about adding more roach (i.e comparing new to new, same material).

I haven't spent a lot of time turning the rig to specs found here (step needs to move forward I know). My uppers and lowers are about 1400 and 1200 respectively measured by a Loos (the larger model). I am gun-shy about having an overtight rig and since that was the first time using the tension gauge I was hesitant to crank up to tighter 16-1800. The rig tune also depends a lot on sail cut so I am not bright enough to estimate the rig need for this new sail (rake, pre-bend etc.)

I appreciate the help! Keep it coming!