As you know, it depends on the type of tuning. I usually use a bit of Extended Bass Shelf (EBS) in my designs. You heard that in the Special Edition Song Towers that you built for me. If I use a bit of EBS, F3 is around 26Hz - 28Hz. F10 is about 22Hz. Using a more conventional tuning such as Paul does, F3 is around 31Hz - 32Hz. F10 about 26Hz.
The W16NX001 driver seems to be a bit tougher to work with than the other SEAS units. To get a decent tuning, I have to use a much smaller port area, 1.5" - 2.0". This is because the cross-sectional area is much smaller to keep from having too much internal volume which can cause a big dip above the tuned frequency (Thanks for teaching about that Paul). So I'm a bit concerned about port chuffing. I can model more power to see what the max port noise will be (Thanks Paul for that one too).
I imagine one could use a larger area port which would necessitate a much longer port length than is available in cabinet depth if one mounts the port tube vertically with an elbow for the terminus. That would keep the port noise to a minimum.
This was all just a quick preliminary design. I'll keep hammering at it though.