helps with first layer calibration for PLA/PETG accross the full build volume. The outer box is sized according to the max build volume of the MK3: X250 Y210. Watch carefully when printing to see if you hit anything unexpected. In case of a crash detection stop immediately. Most common reason for a X-Axis crash is the zip tie assembly for the hotend . The zip tie prevents full movement and triggers the carriage too early. For quickly doublechecking the correct assembly find the original prusa zip tie instructions attached.
If you are "crashfree" use LiveAdjust Z to tune your results. If you do not get flat across the full build space you can try "Bed Level Correct" for the side that has issues. Follow these instructions: https://help.prusa3d.com/article/TPGip0OmaP-bed-level-correction-kit-only
I also attached 3mf files for both setups so that you can adjust temps easily. If you go with the below and have a MK3 you can use the pre-sliced gcode.
Settings for presliced GCodes are:
PETG: Temp: 250C, Bed: 85C, Speed 20mm/s
PLA: Temp: 215C, Bed: 60C, Speed 20mm/s
Prusament PETG /PLA
it is pre-sliced and should only be used with original Prusa MK3.