Piercing rounds recipe should include regular rounds

[ssilk]

But if you followed the thread, you see, that the general opinion is not exited about making them more complex. And in reality also not possible.
The idea was then to add recycling instead, which enables basically the same kind of gameplay: making the recipe more complex by first producing the basic item, then recyling it (cause not longer needed) and produce the advanced item. But it's then not a must anymore, it's an option.

[bobucles]

Galactic trade lets you go a step above recycling, since any obsolete item can be transformed directly into currency.