I thought I would share mine, I created a custom filament and for ages I had horrible issues and I thought it was the filament and\or profile I setup as printing other Sunlu PLA etcc was perfectly fine.
Horrible extrusion issues and top layer issues eg. Sunlu Red PLA vs Sunlu Meta Pink
Printed object as well
Issues like blobs and fast flowing, like over-extrusion, but gaps like under-extrusion - was driving me nuts.
Somehow, my bambu actual slicer was changing everything to be 0.2 width and that was messing with Pink, but not PLA+ - the META just didnt like it.
So once i restored my default settings - everything was fine.
I have replicated the issue with my META as a test in my new install, at 0.2 Widths, in a 0.4mm it just doesnt print for me, yet Sunlu PLA+ Sunlu MATT etc all work fine at 0.2 (with 0.4mm nozzle).
So - this is my settings that works well now I have fixed my Bambu Slicer install etc.
And K values of various Sunlu including my META Pink