Anyone try stuffing their ports?

Using plastic straws on my Mirage M3's changed nothing until there was a sustained bass note like a pipe organ, for example. The straws then prevented the woofer from oscillating. The improvement in such cases is dramatic. The Reference Recording "Star of Wonder" has such a sustained bass at the beginning of the "Nativity Carol".

Response to the "leave it as designed" argument. Simply make a list of the designer's problems:
1. Which shape, size and furnishings in the room?
2. Used with what equipment?
3. How close will actual production be to my specs?
4. What safety factors must I provide so that abusive idiots will not return the item and reduce profits thereby putting me out of a job??
5. What will the reviewers say?
Compare these with my problem of simply how to make it sound best to me in my room with my stuff.
My experience has been that the best sound is achieved either when a good dealer does the whole setup, or when the consumer tries every suggestion that does not result in personal injury.