I know there is winged eyecup in the package but rotating it is bit annoying and wing is bit small.
So I've designed and printed with soft material better one.
I've used threaded ring from original, adjustable eyecup. This way I can easy rotate the eyecup on the thread without moving eyecup up/down.
Works perfect, eyecup is very comfortable and cuts stray light perfect. I can change focal length while keeping eye on the eyepiece.
This is how it looks: