I would make sure your 5575 is around 10 foc and then try and tune the bow. I was shooting an aroow that was 28.5 long @8 gr. per inch with 3 3" feathers and a 125 head. My foc was way off some where around 15+. I like feathers but with this head weight it made the arrow way to front heavy and caused the head to drop sooner than it should. It also was causing me to move the rest to far to the right. The fix was to replace the feathers with 5' vanes adding around 28.5 grns to the rear end and reduce the head to 100. I can use a 85 grn head with the feathers and have a foc just under 12 but I'd rather shoot for 10. Problem of tuning gone. The 7595 is a bit heaver @8.9 and because of that I can use my 3" feathers with a 85 grn. head and have a foc of close to 10. They also are the pro shaft, a step up from the ones I'm using.

BTW my bow is also a 70#. It does have a long brace of 8 1/8 which may have some effect on spine

Am I recommending the 7595. That's like asking a kid if they want another piece of candy.