Need help with PETG on MP Ultimate Maker 2

[D4rki1991]

Thank you!

My current Cura settings: https://imgur.com/a/ihV8crE

If I print with this settings the stringing is almost gone but then the two towers in the test print get really weak and sometimes they just dont get printed or break immediately.
But if I turn off the retraction settings in cura the towers are way more stable , problem is I get a lot of stringing again.I also tried to lower the retraction speed , same result , very poor printed towers like on the pictures in my attachement.
I will try a few prints with much lower retraction and print speed I guess.