Are the rollers rolling when you draw back?
Or are they bound up and the string/cable just dragging along them?

Sorry you didn't notice an improvement, maybe your bow was just ultra smooth to begin with?

I noticed a big difference the day I installed it after I shot it ~20 times with the factory slide on directly before the swap. And then I shot it ~20 times afterward. It feels to me as if the cable/string are no longer dragging, but gliding.

I added some light lubricant to my rollers to ensure they always roll and not stick.

Hope this helps!