set_output_delay -max -ve?

Still babbling...

Another way to think about the -max and -min external delays is they generally cut into your margin, i.e. the larger the -max value is, the more it cuts into your setup relationship. The smaller -min is, the more it cuts into your hold relationship. That usually makes sense. The -max value becomes negative if you're trying to say there is more margin then the setup relationship, and the -min value goes positive if you're saying there is more margin than the default hold relationship.

There's usually about four different ways to think about these things.