The easiest and most reliable place has been working stiff store shelves for me. I usually get 11 or more motor tool parts every time i go to a stiff. Hope that helps.
This happened to me in A17. I restarted steam and my backpack reappeared. Maybe that be might the issue or you could try repairing your game? Goodluck!
Hi there hopefully I help you with your questions.
1. There is a show stability in the debug menu. I believe the greener the block the closer to collapse if i'm not mistaken.
2. Have you tried looking up any horde bases on Youtube? I watch the grand spartan and he has great ideas that I use...