As of now, deco blocks require 1 ingot of their respective metal to craft, but only yield one back with a 25% chance when recycled. I understand this is done to balance autogenerated structures, but it is somewhat counterintuitive, given that smelting metal back into ingots is a mostly lossless process. Perhaps it would make more sense to make the crafting recipes yield 4 deco blocks from 1 ingot (and keep the recycling rates the same)? This way, structure loot remains balanced as it was, but crafting deco blocks manually becomes a statistically reversible operation