Nerf Ultra 2 elite dart conversion

made to work with worker flywheels and 130 motors.
Print the cylinder with supports (only touching build plate is fine) for the inside part. the insert has a key that lines up with the cylinder.
If the cylinder is tight, you can drill out the center to 1/8".
Works best with deliberate trigger pulls, not so great when rapid firing (yet).
the Ultra 2 needs a slight shell modification for this to work, just cut off the piece that interferes with elite darts.