Can't find a way to avoid traveling over outer walls

[kamermans 0]

Hi all,

 

I've been trying to figure this out for a while now with no luck.  I have a model (shown sliced below) with many slots in it.  When it is sliced, there are many travels between the slots, leaving strings/blobs behind all for each.  I tried to avoid this traveling by using "Combing Mode: Not in Skin" (and I tried "Within Infill") and I have "Avoid Printed Parts When Traveling" (although I don't think this is relevant), but it still makes many trips across the outer walls (of the slots) to fill some voids.  I thought that maybe the wall thickness was causing the walls of the slots to touch each other, leaving no room to travel without crossing a wall, but that wasn't it either - it also happens with 1 wall line.

 

Any idea how these travels could be avoided?  I can turn on Z-hop to reduce the problem, but I'd rather know what I'm doing wrong (if anything).  I'm using Cura 4.11.0 on Windows and I've attached my Cura project for reference.

 

Thanks in advance!

 

cura-wall-travel-example.3mf