Those sparrow upgrades you buy from Xur using strange coins? Can you use them on a sparrow that is already legendary? e.g. could I use a void drive or emerald coil on the XV0 Timebreaker to increase its speed and durability?
I know it says "on an equipped rare sparrow". I'd just like some confirmation. Maybe if someone could try it and tell me what happens?
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Apparently not. Well that sucks..