Note re Step 13: the cable has a 'click' type lock (you can see it as a narrow brown plastic strip on Step 12 and 13 pics). This lock can just about be disengaged with care before extracting the cable, I didn't, I just released it with tweezers as shown, and it didn't cause a problem. However, reversing Step 11 is very very difficult and you MUST have the click lock thing open before you begin (it's easy to see and understand when the switch plate is off , look at Step 12). You can then (just about!) re-insert the cable, and through a hole in the metal frame, just kind of below where the shutter button lies, flip the lock back down to hold the cable (use a tiny screwdriver or similar). It took me an hour to get the cable back in...so good luck with this part!