Youngbird,
Don't go by the 7:1 or your 6.5:1 ratio in figuring your gearing. That is what the ratio is when the clutch 1st engages and the belt starts to turn. Once the RPM's come up, the ratio starts to go toward the 3:1 or if you're lucky, 2.5:1. That is the number you should use to figure your final, top speed gearing.
Also, your final ratio will depend on how much RPMs your engine will develop and how the CVT interacts with those RPMs. Then you can get into tuning and such and that's just trial and error.
My experience was to go with 4.5 to 5:1 final gearing.
Good luck...enjoy!
WC