> I'm debating about whether to enable zipmax internal compression or not.

There is no real rule to enable or disable internal zipping. Sometimes it gives you some bytes, sometimes not. Same for any kind of external packer.


> Also, I suspect that BJWFlate may be failing on very large zip archives (85MB+).

Guess you're running out of memory ;) BJWFlate is overkill. I personally don't use it. For any problems, ask the bjwflate author (which can be a bit tricky, since he retired from the internet)

Roman Scherzer
ClrMamePro