The ACS/CX experience I had was a little over 3 years ago, shortly after OL came out with the "CX" version. The bow I owned shot GTs okay but not the best arrow flight no matter how I weighted them. The best arrow flight came from a barrel tapered sitka spruce arrow. I got to rummaging around the shop and by golly I found one these arrows that I shot w/ the acs. This shaft is spined about 73#s, cut to 29.5" b.o.p., with a 125gr point. The weight is 566gr. The velocity wasn't quite as high with those arrows but arrow flight was about perfect, the best arrow flight I got out of that bow.
I have only one of these barrel tapered arrows left and have no real use for it. If you'd like to try it PM me your address and I'll throw it in a tube and mail it to you. Doug