Dumb question?

Yep, I'm currently finishing pt 7, I think. Then I get to use the skins and recycle castle.

Note: misread . The recycle casle won't be available until you read the dialogue for part 9 of a quest.
The castle should be at the very very end of your inventory, as you don't unlock it un till p9 of a quest. If it isn't there try syncing the town (go to krustyland and back) if that doesn't sort it come back here.

Thanks, all,

Figured it was something along those lines, but nice to hear, regardless. Much appreciated!