Martin,
I think your statements are quite to the point. I have put woofers in U-baffles with top and N-baffles. In both
cases it is quite easy to hear and identify resonances above 100 Hz. Now, for this design I am confident of the performance long up
to over 300 Hz which will be about the highest frequency I would like to employ for woofers with some various speakers
to test.
And I should also say, bass performance with good chassis is excellent !
/Erling