The Flsun QQ-S Pro is one of the stark examples of the 3D printing community's strengths. This is because the large delta 3D printer comes with strong hardware, but firmware that does not meet the minimum requirements. Only a firmware from GitHub eliminates almost all problems of the QQ-S Pro in one fell swoop.
https://www.notebookcheck.net/Flsun-QQ-s-Pro-3D-printer-in-review-Hardware-top-firmware-flop.610100.0.html
Don't you mean Titan extruder?
I've yet to see an extruder made of titanium....
This printer has since been replaced by the Super Racer. Which is a superior unit to this.
I know this comment is two years late but this is by in large the most clear, concise, and well documented reviews of a printer I have seen. I own this machine and I have all of the exact same issues, well done will be trying marlin out.