Phew............... There's no true 'correct' procedure surpmil, except the way you were taught as apprentices. But don't forget Surpmil and others that while you're doing that, your fourth hand has got to make sure that the awful Mk1 type clicker plunger is still a) central in its hole in the PLUG, screwed, clicker plunger at the bottom and b) the flange at the top is seated below the............... I won't go on! All this, while it is completely hidden from view, covered by the index plate.
Of course you can do it several other ways and I don't want my way to be the definitive way by any means. I would do a pictorial essay but I am always aware in the back of my brain that once you've overhauled your sticking or loose drums, you've got to put it together again. And that's where the problems just begin........