I’m not sure if you’re still having trouble with this Jarred. I’ve found that Slic3r does better when you measure the extruded filament in air to account for die swell and input that number as the nozzle diameter. In my case it was .4 for a .35 nozzle, which I think is pretty standard. I found a page related to calibrating Slic3r that suggests doing it this way, but then the application itself says to put in whatever the size was that you purchased which doesn’t seem to be good advise for those that want accuracy. After that point I adjust the flow so that if Slic3r thinks it will create a .4 mm wall that it actually creates a .4 mm wall when measured with calipers. That takes in to account the math that Whosawhatsis is talking about which Slic3r doesn’t do. Then the rest of the gcode movements that it generates are sane. Moving from .25 to 9.75 makes more sense when it actually is laying down a .5mm wall
I’m itching for Johnathan to come back to kisslicer… it’s “inset surface” feature is priceless for this issue…
Cheer a tho mark, ill consider that method if I ever get time to use my machine again! Lol