basic schoolboy error

[robbo]

It's easily done, thinking you'll remember something in a few days time which appears to be glaringly obvious when taken apart. For years I've had a white board for using non permanent markers on the garage wall, to make notes or scribble a sketch of a part on, or list the torque settings of what I'm about to work on rather than thumb through the manual with oily fingers when rebuilding said item.