I didn’t actually have to do all of them manually – I wrote a computer script to do a lot of them. The script itself involved a lot of “how many of them can I get automatically this way? How about this way?” but in the end it got most of them, leaving only a couple dozen maybe to do manually. Still took a few days!
So I’m not sure what I’ll find about differences by age, but I’d guess activity level might be one we’d see. Hopefully I’ll get to grips with this this week. If I find anything I’ll post here to let you folks know.