Chop Shop

Fifty objects through a shredder, counted across the whole save - no need to do it in one session. Crash-site debris is the fuel: do a sweep with a rover and a shredder on the back and this falls out of a single tidy-up tour. Small bits go straight in the Medium Shredder; stack the bigger wreck pieces somewhere until you have a Large Shredder to swallow them. One easy way to keep the count moving is to shred as you explore rather than hauling everything home first.