the armoire is extremely arbitrary...

[Felis]

I bought the game when I did, I was there to experience Heavensturn, why should someone that picks up the game next June have the ability to pick up 7 of the 12 helmets available?

7 helmets? Only the 3 usagi kabutos are tradeable, because they were crafted in 1.0. Ok, 2 were crafted. The red one was used as a basic mat for the other 2.

old recipes:
Black Usagi Kabuto (Armorcraft, Rank 11-20) : Usagi Kabuto, Kabuto Mask, Blue Odoshi Cord, Black Urushi × 2
Silver Usagi Kabuto (Goldsmithing, Rank 11-20) : Usagi Kabuto, Kabuto Mask, Black Odoshi Cord, Silver Leaf × 2

You got the event mats with ringing a bell

The reason why SE don't just change them to U/U would be because some people would have already 2 or more from the same usagi kabuto in their inventory/retainer since 1.0.

[Dark-Saviour]

The reason why SE don't just change them to U/U would be because some people would have already 2 or more from the same usagi kabuto in their inventory/retainer since 1.0.

The simple solution would be to let you place as many as you want into the armoire, but only ever let it hold 1.
So if you have a bunch of crap (that isn't deletable), you just keep shoving it in to condense it.

But yeah... Flagging these things as event items and thus 'armoirrable' is incredibly simple, so they've got to be purposefully not letting new ones be stored. Why? No idea, but whatever the reason, it's bollocks.