coffeeclimber

Hello Ultimaker community. I have been working the last couple days on settings for printing using a 0.8mm nozzle on my Ender 3. My goal is to dial in settings for larger prints with 0.8mm width and a 0.6mm layer height. I have had several issues with the default "Draft" profile in Cura 5.0 for a 0.8mm nozzle PLA, including gaps in my first layers, poor infill bonding, some over extrusion on the z-seams, and a rough top layer. I was able to resolve the first layer gap by slowing the Initial layer speed from 25mm/s to 15mm/s and the infill bonding by slowing the overall print speed from 50mm/s to 30mm/s. The remaining issues I have are now related to the z-seam, which I can only think to describe as producing a woven pattern and the top layer, which is producing a rough surface as the nozzle drags through the extruded filament (over-extrusion maybe?) I have tried to do my due diligence with searches but have hit a bit of a roadblock as I maybe don't know the proper terminology to be searching for. Specifically, my question are: For the z-seam, how/why it is overlapping the very start of the layer and producing this woven effect? Which parameters would affect this? From watching it print, it doesn't seem to be so much of an over-extrusion issue as an unnecessary amount of overlap before it transitions to the second layer inward on the wall. For the top layer, what is going on? My suspicions are either temp, extrusion amount, or another setting that I am unaware of. So far, I have tried reducing the Top/Bottom speed to 15mm/s, Top Surface Skin line width to 0.4, and Top Surface Skin layers to 2. I have not tried "Ironing" as it seems this is still too extreme for that setting to resolve. I have attached my .3mf file with all parameters should that be helpful. But here are some quick details PLA - Amazon Basics black Printer - Ender 3 with 0.8mm nozzle Plate temp - 50 deg Nozzle Temp - 200 deg Retraction Distance - 4mm Speed - 45mm/s Prime Speed - 15mm/s Layer Height - 0.6mm Initial Layer Height - 0.3mm Line Width - 0.8mm Top/Bottom Line Width - 0.6mm Wall Line count - 2 XYZCube_0.8mm.3mf