To continue this thread
Hang the box from the top fixing let it hang down. Loop on the rope tighten with your turn key (I use a broom handle funny I have a short one here
), when it looks about right, swing it forwards as it does the box length shortens slightly if not correct, swing back adjust length till a swing gets it in line you may need to release slightly or tighten when in position to align hole, make sure your FF17 is not completely blunt at the start of its thread and screw it in, I use a socket with a nut inside held with plasticene on a short extension the same as I do when fitting front tank bolts the pressure helps...