For a little while, Eisen continued preparing the different ingots that he would then one after another hand over to the Kobolds responsible for the different sizes of arrows. It seemed like it was possible to really fold the elemental mana into the aluminum as Eisen had hoped, although it was far less efficient than when Eisen tried to do the same with his own mana, which was kind of understandable if one thought about it.
But even then, the ingots became incredibly light, and while they maybe weren't as strong and durable as Eisen would like them to be, as long as one took proper care of these it would be possible to use them over and over again. And if they ended up breaking, if someone picked up the pieces, Eisen would be able to re-forge them as well.