I bought two sets of these. One set to go in my sons Raven and one set to go in my Rapid Strike.
I’m quite particular about ensuring that testing is performed in a controlled manor.
For this sake I have a high amp adjustable PSU which I soldered onto the Raven for testing to ensure I had exactly the same voltage (12v) thought my testing. I also have a chronograph to check for changes in FPS
The flywheels are very well made BUT unfortunately the Raven lost between 6-10 FPS using the Worker flywheels over using the stock flywheels (With nerf dart residue on them)
So it looks like i wasted my money on these and will return to the stock wheels