Thank you kindly, gentlemen, I appreciate all your comments. However, the problem has been solved for me...I knew my hands were bad today, but I didn't realise quite how bad they were until I picked the crane up...and promptly dropped it. It hit the side of my workbench during it's fall, and disintegrated into pieces as it hit the floor.
I didn't swear (believe that, and you'll believe that the world is square) and so the crane has now been filed under B1N...sorry Bob.
Thanks anyways, guys...I am now in full sulk mode.