Perimeter-only settings for vector extrusion with only 0.4 and 0.8mm walls

[hansipete]

Hello fellow 3D printing people,

I'm printing these decorative pieces that I design in Illustrator. I thicken and extrude in Blender, export to STL and use OrcaSlicer to slice and send them to my P1S.

These models have more or less wall thicknesses of 0.4 and 0.8mm only (model below 0.4mm only). I'm struggling to find the right print settings for them. I'm using the stock 0.4 nozzle on the Bambu. Find my slicer settings (where I think I need to adjust most) and the result below:

Using Arachne wall generator will produce something usable at all. Still there's holes here and there. I found increasing Wall transitioning angle threshold helps reducing these artifacts.

For the bottom part on the screenshot: Ideally I could instruct the slicer to first lay out "walls" then add the "lamellas" (or vice versa) – possibly with two seperate models? I tried with seperate STLs but somehow it seems the slicer retracts before touching the other STLs perimeter, resulting in a weak joint.

Maybe one of you printed models like this before and has some parameters to share that are worth adjusting.

Thank you,
Hans