Twin Star gearbox oil level inspection

The gearbox oil level of the CD-135 engines of our Twin Stars is inspected through a small round glass at the prop end of the engine.
We have newer gearboxes on both DA42s: the oil level does not need to be at the top of the glass, but the level is correct when the oil covers (at least) half of the inspection window:

So if you see it at just about half, you’re good to fly!