I am going to make a big print tonight - 16x20.

I typically dilute Dektol per Kodak's instructions - 1:2. How far can I dilute this and still get a max black? Since I am going to make ONLY ONE print, I'd rather not prepare a gallon of developer using the standard dilution.

I'd appreciate if you can stick to the topic. Please - no discussion of how dilutions are expressed or if this is a false economy.