It was a little off. I had to cut a piece to make it fit but now it fits well and was an easy fix. If you notice in my pic I included the plastic piece on the left is a little longer than the other side making it impossible to snap in. After cutting it about a half inch it fit perfectly.
Reply from: pawpa2491- Feedback replied by seller pawpa2491.- Feedback replied by seller pawpa2491.
The WS2200 bump knob has a longer tab on one side of it. Where the WC2200 bump knob tab's are the same length. The inner line reel that the bump knob snaps into works with the WC2200 and the WS2200 trimmer. If the B side of the reel is facing up in the cutting head you need the WC2200 bump knob. If the B side is facing down you need the WS2200 knob. The WC2200 head turn's clock wise when using it and the WS220 turn's counter clock wise. The reel is designed to work either way.