Thanks for that information Roy, especially about the rings and screens from the AR-11 not being able to fit on the simply speakers midrange replacement.
Are AR-11 midrange speakers repairable? One of mine has started to distort and become quite muted compared to the other. I live in New Zealand so AR spares is non existent here sadly, and ebay charges a fortune to ship to here (sometimes more than the brought item!)
Cheers!