Worker cage issue

Hi, Ive installed xsw auto kit into an orange stryfe and a cantilevered cage (sorry I cant remember what model Ive had it about a year, its silver). The flywheels are workers, blue with a diamond pattern. The issue Im having is that it wont pull the darts through. If you push the dart into the flywheels it shoots them out just fine but it seems the gap between the wheels and the front of the dart (only talking a mill or two) is big enough that once the dart is pushed by the xsw pusher rode, its not enough to engage.

Im using the recommended flywheels but to my very untrained eye they look like they just might be too small.

Anyone any ideas as to what Ive done wrong? Ive ordered a larger set of wheels.

Cheers