Hey everyone, I have a Hayward C1200 and just replaced the locking knob with the CX900G. I believe this is the correct knob but it is not fitting properly on the rod. I was able to get it to screw onto the rod but there was a gap between the lid and bottom that allowed water to leak through. Messing with it, the rod has gotten stuck in the knob a few times as well. Does anyone have any ideas? I appreciate the help.