Fuzzypyro, 4 months ago

I can only add 2 things that I know of here that could help.

#1.Try a linear advance tune. That alone should give you sharper corners and more consistent details at higher print speeds.

https://marlinfw.org/docs/features/lin_advance.html

#2.A direct extruder can help with getting very precise sharp corners but from what I understand it will hurt with accuracy on curves. Also there is the whole fact that there is a motor on top of the hot end so weight and whatnot will hurt speed.

Anyway just check out #1. It should help with your issue. If not that then a feed rate tune would solve any over extrusion problems.