Jeff,
If i read your question correctly.....
The top hat section u r refering too, ....is the white ring that is held in by the lugs screwed to the drum body..
If that is so..then u r fine, it is supposed to be split at about 11.00 oclock........this was a modification that Dyson did.....the original was a solid ring.
Hope that helps u
Cheers
Dave...Cape Town..dcrw@telkomsa.net
Dave
July 2007