Hi Metro,
"But, if you did Self-Cleaning for the sink and Self-Cleaning Wall Coating for the Shower, then those have different names and both can be counted."
The word "add" is a separate word, and so it seems like a unique upgrade, to me. I know, it's just one word, but it is different. For, example, it would be a different puzzle in "Wheel of Fortune" because there is at least one word that's different.
Whatever, the team decides is fine, but I wanted to explain my reason for my opinion of which upgrades should count as unique
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