Like I said, I couldn't see any difference. The speed balls are suppose to increase speed, and the spiders decrease speed. I used them together. Maybe if I went to a Chono (which I can't see doing to see if my bow slowed by 2 FFS) what you said may true. All I know is that the arrows hit exactly the same up to 40 yards, with or without the syders. And that's all I'm concerned about.