Paul's last picture shows the mechanism that pushes the pin, and the end of the pin that gets pushed, but it doesn't show the end that has to stick up past the cam. We need to see what the working end of the pin looks like, with the centrifugal weight in that same position as in the last picture. We also need confirmation that the working end of the pin can't be pushed in slightly, by fairly heavy pressure, such as it receives from the valve spring via the rocker and pushrod.

Paul, here is your second-last picture, with the working end of the pin circled in red. We are looking for pictures that show us how far that working end sticks up past the surface of the cam.
[Linked Image]