It’s not, I mean it is but now how you’re thinking, see how there’s no oil behind it on the lower “ground” is effectively. The edge of the retainer thing and the oil that is trapped between it and the sight glass. I will record some video of it being tilted past it’s balance point to that side tomorrow. I hope to god It’s not as bad as it seems to be but no matter what when centered the line isn’t even visible let alone at the minimum lineIf that's oil I see at the very bottom of the sight now. It would only take a small amount of oil, probably 6-10 oz, to bring the oil's level into the middle of the sight glass..