That's great. but is it still the case that, as mentioned on page 8 back in September, we have to restart now, instead of just re-logging? That puts a big dent in Yamiks' recommendation of irregular markers as a faster grind for engineering materials.
I found a Threat 2 one in [Trakask?], close to [Safe Station?] (I'll check these when I log in), and didn't bother re-logging - or Supercruising - because I was doing other missions. However, it gave me enough weapons schematics to upgrade my Intimidator to 4, so when I went back to that system half an hour later to pick up rewards and more missions, I dropped in and... containers still open and empty (though of course, the scavengers were still spawning).
So, grade 5 will take a bit longer.