Jeff I found 500fps's reply about the Speed Pro's and his BK...I was curious too when I heard about someone trying it for giggles. Here's his response:

"I got 412 fps from my 04 BK, 71/29.25, and don't know the exact weight of the arrow....they are 29", 3-3" feathers, 65gr screw in point

Well, I took the string silencers off at the same time I switched out the modules, so there are 2 factors in the increase in speed, but I got 422 fps. The reason the increase wasn't more is that the 29" module AMO's at 29.25", and the 30" mods AMO'd at exactly dead nuts on 30", so you are only increasing draw length by 3/4"
"

[:-]