OK, first, w/ your specs, you need to be shooting 300's, not 340's. Right now you are underspined. I was looking at CX's website and didn't see 7590's?? Is that right? I thought they made a 7590......at any rate, a 6075 isn't stiff enough. You can get the correct spine in aluminum......you would need a 2514 or a 2613.

As far as the wobbling of the arrow, sounds more like a tuning issue. Have you paper tuned the bow, or just picked it up and shot it? If you haven't paper tuned it, that's second on the list after you get the correctly spined arrows. If the bow isn't properly tuned, you could use a tree trunk and it wouldn't help the wobble.