I broke the button after it got stuck one time, so I spent some time reverse engineering the button and it came out pretty dang good. You just snap it in place and it stays there, just like the original button.

Yes

0.1

I highly recommend printing this on its side, that way the part that clips onto the adapter has the correct orientation for the kind of load it will be under. It also should be printed with a fine resolution as there are fine details.