For instance, in the sentence:
Without adding new items and modifying existing items.
Would it be correct to completely remove the first reference to the noun items? as in:
Without adding new and modifying existing items.
It sounds wrong. Is the only correct alternative replacing the explicit noun with an implicit reference as in:
Without adding new items and modifying existing ones.
Is there a more elegant way to avoid writing the explicit noun twice in this sentence?
I read this: Mixing adjective and noun enumerations but did not find it very useful.