So, I would first like to say I recently started playing this mod, and loving it - it's a bit grindy, but still very fun. However, I think I'm going to have to take a break or start over, because I just got very mad at it. I've spent hours trying to get enough Tin and Copper to make the Tier 1 rocket, and I had all of the fins and engine created. I put them in the NASA workbench last night, then logged off. When I logged in tonight, I updated to the latest version, walked over to my NASA workbench, and they were all gone. Hours and hours of synthesizing, sifting, hammering, smelting, and crafting disappeared. I should have known better than to leave them in the workbench before logging off, but it's still incredibly disappointing. Just thought I'd leave this as a word of warning.