Now, Mr. Hammer, the guy said he had a 62 inch 40# recurve in his message. You must have had a beer already 😆
Other than that I think you spoke truly about carbon arrows.
My suggestion for a brand would be gold tip traditional. They are lighter by 2 grains/inch than the carbon express which allows for more FOC. And as for spine, I’d get the 35/55 for that bow.