Dave--the first question than came to mind concerns your set up.
You have mentioned you are pulling 70 # with a 27" draw length--and using a 24" shaft. I am left to assume you're using an overdraw given that your shaft is 24" in length.
The shaft is correctly measured from, the 'bottom of the nock groove to the end of the shaft' (immediately behind your insert). Given that your information is correct, I will provide some numbers, (rough estimate), for you to look at.
Estimate:- The 45/60 Terminator Selects weight about 9.5 grains per inch, so the 24" shaft (alone) would weigh about (9.5 X 24) = 228 G. Assuming you using a 100 grain head, (125 or 85 then add that amount), about 15 grains for your insert, 10 for your nock, and again assuming the shaft is fletched with 3 - 4" vanes (each 4" vane about 8 grains) that will give us another 32 grains.
The weight of your total arrow would be around 385 grains---give or take a few grains.
The CX 200:- The weight here is 7 grains/per inch, so ( 24" X 7) = 168 grains. Going with the same set-up with the 45/60 Terminator, this arrow would weigh about 325 grains--give or take a few grains.
Some bow manufactures advise, an arrow has at least 5 grains for every pound the bow is set at--in your case 70 pounds X 5 grains, we're looking at about 350 grains.
This being the case the CX200 @ 24" will be a little on the light side for your set up--where as the 45/60 will be just fine.
Lighter (than recommended) arrows will fly faster (leaving the bow), but will increase the noise. Can also cause damage to the bow. The heavier arrow will maintain the durability and enhance penetration, providing all things being equal of course, draw weight, arrow length, etc.
If I were in your position, I would return the CX200--your 45/60 will work just fine.
The price of your bow, and yourself, is worth much more than $23.
Sometimes we can't win 'em all!!
Hope this helps.