Sorry if this was already mentioned, I didn't see it while searching.
While recovering ruins, one one of my archaeological dig planets my construction brigades recovered a pile of Jump Construction Module - 90's. I went to move them with a Cargo Task Force, and I guess due to the sheer size of them they were only able to load 2.9 of them ( even with 2.9 it was reporting -130000 / 850000 cargo space available). I unloaded them on my main research planet and started disassembling them while the cargo task force went back for another load. The total components remaining as I disassembled them went down to 0x, and then it let me keep disassembling them into negative quantities (-1x, -2x, -3x, etc), giving me research points each time.