Re the cam
It is not used as a cam like in an IC engine. in fact it could be circular. I just used the phrase for identification purposes with the picture in the previous post.
To explain there are three bolts through the cam, one has the axe bolted loosely, so the axe arm can pivot on the bolt. the other two bolts are for engaging on the axe shaft on either the strike or the retract mode.
As with all these type of things the reality is a lot simpler than the written explanation.
I hope to run a video of the operation so you can see it and then you will see how easy the mechanism is :shock: