Used whorl ext, need to close inner circle

I managed to do this last night, but I was drunk when I did it, and now I can’t remember for the life of me how I did it. I used whorl extension to get a tapered screw.

I’m trying to create a cam catch. I have a cover in my van and want to create an access panel.

Thank you in advance.

I have no experience with Draw whorl but I found a video about it. Maybe this helps:

I always go back to that video as I forget which function does what. Thank you anyway.

In the end, I made the thread length the same as the radius, then intersected and cleaned up the mess. I think I now know why I was drunk after finishing it, joining up the geometry by hand aha.