So I'm feeling a touch silly. I thought the motor powered through the full stroke as I've seen in some examples on youtube.
However, it is one of the gravity examples that simply unlocks lol
So, it unlocks by using the motor to push its hub out 5mm which I'm guessing gives it clearance internally from however it locks. GRAVITY then gets it to fall to the middle of the stroke. You then pull it up until it locks in place.
Where I got caught out it because I had it upside down for bench testing (thinking the motor was used to slowly power it through the full stroke), which means the GRAVITY part of the process was impossible. Yes, I'm a cabbage lol.
It does the same but in reverse when you put it back.