One of the advantages of being a team of scientists in large part is that there are a lot of people with read-made knowledge, except for maybe the Geologist who dies in the pilot "Air", but they have engineers etc
Regarding 800 years from the Tolans, that's a bit hard to say, because there can be hundreds of years of little progress (dark ages), then a century of almost unimaginable development during the 20th century...



