They should be prioritizing count (I mentioned that was the performance metric). They actually wouldn't need to "make sure all their nails weigh the same", only

They should be prioritizing count (I mentioned that was the performance metric). They actually wouldn't need to "make sure all their nails weigh the same", only that on average they weigh as much as the template. If you can't save time by using less material, and you can't save time by generating fewer units, might as well make the foundry mold match the template, no?