If you would, please, tell me how to....

If you would, please, tell me how to remove the pop-up 45rpm spindle on a Rek-O-Kut Rontine turntable? I want to play with mats and it kind of sticks up and gets in the way.

Responses that tell me that I shouldn't do what I want to do will discreetly be ignored. Thank you kindly.