Board Thread:General Nerf discussion/@comment-35070608-20181216012210/@comment-27306930-20181219051138

As far as alignment goes, there are two types of flywheels - concave and flat. Accordingly, there are two different ways to align these kinds of flywheels.

Flat flywheels are more tolerant of alignment issues. As long as most of the flywheel surface is visible in the flywheel cage aperture (aka opening), the darts will catch properly and exit normally.

Concave flywheels on the other hand, are more difficult to align. They need to be vertically symmetrical in the flywheel cage. When you look down the opening, the flywheels should be even left-to-right, and centered in the middle of the cage. It's a little tricky, but definitely doable. It might take a couple tries.

I wish I had a picture handy, but bottom line, when you look down the flywheel cage, everything should look symmetrical.