Ah - ExtractAllEntries looks exactly like what I need. I saw there wasn't 7zip support in the ReaderFactory and assumed that was it, but it looks like ExtractAllEntries works fine.
In that case I guess there's no need to make any changes since there is a way to extract solid files efficiently, thanks for pointing me in the right direction :)
In that case I guess there's no need to make any changes since there is a way to extract solid files efficiently, thanks for pointing me in the right direction :)