Regarding the dust caps that I didn't fancy so much...I now LOVE them. The dust caps according to Ian serve a functional purpose and may be one of the reasons why after all the EVIL I have thrown at this sub, it's still working!

Those who don't have dust caps are on their own.

Must have more dust cap.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated