Fantastic test to be able to calibrate retractions, in my case they came out perfect the first time but it is appreciated that this test exists to be able to access it quickly and easily. I can't give it 5 stars because I had to stop printing because the piece came off right at the end, you can see in the right column that it has some errors
Bed Adhesion Issue:Use PP-CF without previously applying a glue
Maybe try to add a brim so it sticks a bit better to the printsurface ;)
Please note that the test was designed for PLA, not a difficult material like PP-CF, you may need to change the settings a bit for the chosen filament.
A good quick test that helped me reduce stringing by printing a few times with different settings.
The 2 tall columns are more realistic for parts I would print than other stringing stress test models I've seen.