I used the accelerator balls on my previous dual cam bow (High Country Ultra Extreme)and shot through my chrono, I noticed no gain in speed at all, I did however manage to destroy a set of cables from the balls hitting them. If your string is close to your cables be carefull as the string travels quite a bit forward of its resting position, on my bow the cables were close to the string, if this is the case with your setup I would advise against them. I been told you can also use nocking points and heat some shrink tube over them. If you want a increase in speed order a BCY 8125 string from George Bowman and you will see an honest approx 10 fps increase.Best of luck
Bowtech Dually