Porsche 911 BOSCH DME engine ECU repair and explain

Sorry about my umming and aahing youtubers, Decided a minute before closing the ECU up to make a quick off the bat video about how these vintage ECUs were put together and to give component locations. Maybe my reverse engineering can assist others in troubleshooting their BOSCH DME units, The components which I point out and the unusual function of the injector driver circuit I am pretty sure of though, but dont weigh up my words with gold ;-) BOSCH are still clam tight about info on these ECU series, even after 35 years, and other info on the internet is scant.