Impressive sympathetic restoration, congratulations!
The burners of my two Schoenner Lipsia's (and the one of my Märklin Lispia, which has a similar burner) have much shorter wick-holder pipes, 2-3 cm above the deck of the burners. The filler screw has a short, rather sharply bent vent pipe.
I will take a photo, if you like, but I have to unearth the engine somewhere
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