SO what worked for me was the following.
New hardened steel extruder gear assembly. New 0.6mm hardened steel hot end assembly(not just the hot end.)
Some quick filament settings- Flow ratio- 0.94 Pressure advance- 0.022 Temp-255 all layers, Engineering plate- 70
Fans (using broken orca version)- 40—15 , 90—6 keep fan on, force cooling on, threshold 50%, overhang speed 80%. Aux fan 30%, retraction- length 2mm, zhop 0.4mm,
Preset settings are using honeycomb and concentric, infill combination, speeds pictured.
I have printed about 18 parts identically and perfectly since the install of the new parts. With these items being 8 at a time and taking 3h45m.
I noticed that when loading the filament for this new hot end for the first time that alot of grease was purged from inside the nozzle. Is this helping it ?? Dunno.