On Aurelias, early cars can have just the drums removed (usually with just a little help from a hammer) whilst leaving the hubs in place whereas later cars where the drum is very securely attached to the hub itself require that the hub and drum are removed in one piece.
To do this one uses a puller which screws into the thread on the hub where the large castellated nut has been removed so there is no concern about putting any pressure on the brake drums themselves.
If one is changing brake shoes or wheel cylinders the hub itself really needs to come off anyway to gain proper access.
Photo to follow.
Chris
Apologies for the delay in posting the photo of my front hub puller. You can see it doesnt distort the front brake drum at all.
Chris