This video does a good job of visually showing you how to get the circle-pad part out. https://youtu.be/XGdRim2Mvrk?si=8bhyzt52...

If your only goal is to replace the circle-pad, the following steps are unnecessary. You can skip to step 21, the removal of the circle-pad.

I used what I believe is a 1.5mm screwdriver which I received in one of those 60 in 1 precision screwdriver sets. It fit perfectly and much more snugly compared to any of the J0 - J000 bits.