A bunch of free material can be obtained by destroying a survival capsule blueprint. To reproduce this bug, open the tablet, go to blueprint menu, select survival capsule, place the blueprint into the world, then select the grinder tool and destroy the blueprint. One may choose to partially assemble the blueprint before dismantling, as long as they don't finish the construction. This will give 4 aluminum plates, 1 glass plate, 3 small engines, 2 packs of screws and one electronics, in addition to any resources that might actually have been spent. I've tested a bunch of other structures, but it seems this bug only occurs with the survival capsule.