Randomly underextruding/overextruding small part on CR-10
The first one has major extrusion problems going on, possibly combined with issues caused by things you did to compensate for it or other issues. You should not see &quot;bubbly&quot; surfaces like that. There are a lot of things it could be, but my best guesses are wet filament, clogged nozzle or damage in the ptfe tube (if your printer uses one), and your 90% flow rate. If it was really printed &quot;right after&quot; the successful hemisphere that probably rules out wet filament and indicates a clog of some sort or your changes to settings.
Your retraction amount is probably good if you have a bowden printer but excessive and likely to clog with direct drive. Coasting and extra unretract are always wrong; they were a hack from a long time ago trying to simulate what linear advance feature in firmware does, but with a fixed hardcoded offset. Flow rate as low as 90% is also wrong unless your steps per mm were miscalculated. You can only go up/down by a few % without messing things up badly; there just isn't that much room for error.