Ok, done with The Pitt now. I can see why some people say they don't like this particular one, the story was a bit wishy washy but the environment to explore was interesting and I came out with a few more good bits of loot. In fact I had so much I wanted to bring out I ended up leaving some behind. Trying to carry twice you capacity out with you is not practical.
 
Oh, I did find that last ingot as well without resorting to a guide. Seems I missed one in a group of 3 in the middle of the radioactive barrels. However glitches did rear their head again with the no appearance of Wild Bill in the steelyard (or more likely from reading that his body fell through the roof of the building it is supposed to be on) which meant I couldn't do one of the small side quests.
 
Anyway, moving on to Broken Steel next which means I just have to finish off the very last bit of the main quest line and see what happens. Also since my character is pure evil I'll be trying for an ending where I kill as many people as possible.