Don't worry on the demotion I pretty much lost interest in preening inactive staff ranks a while ago, so your rank is fine
Also for your builds if you want them saving out to schematic just do a worldedit selection of the area, then
//copy
//schem save mcedit <filename>
where <filename> has the prefix of your username, like "senpai_asteroid"
Let me know when you have them all saved and I'll zip it up for you.
I keep regular server backups of all the maps aswel so is always that to if you need the whole map files.
Anyway good luck with the course man.