Normally, reversing the steps in this guide and others is quite straight-forward. In this case, you really need to add the steps to reconnect the four ribbon cables from the LCD panel. Disconnecting the ribbon cables is easy but re-attaching them with one hand is a lot harder given the limited cable length, weight, and fragility of the LCD panel. Even putting the iMac on its back and bracing the LCD panel at an angle with ball point pens leaves very little space to work. Any techniques you can share to make this awkward and breakage-prone part of the operation easier would be very welcome.