This is the Prusaslicer .3mf file that I use to print my string art when using my MK3S.
Several people have asked for the slicer profile so I am providing it here. This is for the MK3S, 0.4mm nozzle, PLA. Open Prusaslicer, select 'File' and 'Open Project' and select this file.
To test the profile please use my string test model which you can download here: https://social.thangs.com/m/224449
Please don't use it for other printer configurations unless you are comfortable to make adjustments.