Yeah I will give it a go, thing is when I was looking at it last night I just put it together with just the central screw and pulled the handbrake mechanism round (holding it all in my hand and applying pressure to the central rod with my thumb to hold it in place) and you can see the central rod move outwards... all good I thought...

But then you can pull the handbrake mechanism just another few mill to its final extent and then the bullet appears to slip and the rod moves back down a bit.

It's almost like it goes past the point it should stop at??

Will have another play later!