My forum is heavy on posting hardware manuals. It's an essential feature of the site, and all PDF manuals up to 5MB should be allowed. However, we have an issue with people who are looking for support posting uncompressed JPG and PNG screenshots of their screens, which is bloating the database. I have warned people to compress their screenshots, but that doesn't help. XenForo should allow admins to specify a size limit for different types of attachments. That way we could keep a 5MB limit for PDFs but limit JPG and PNG to 100KB.