Not that I can see its a fully fitting rubber cog internally and the cogs fit the side wheel. It doesn't sit right from an engineering point of view to have grip screws at only 9, 12 and three to have one missing from the 6 o'clock. If they were at 12, 4 and eight I could understand it but they aren't arranged like that.
If one owns this scope I'm intrigued if mines an anomaly. If mine isn't to spec the fix is easy. Hence I'm asking if it's normal or not.