I created this speed test in order to see the difference between various speeds.
The factory file (S3D) is included which has multiple processes with various speeds in order to print it in one time.

Speeds go from 20mm/sec up to 120mm/sec in steps of 5mm.
The steps are getting smaller as the speed drops, so the print takes only about an hour.

Different speeds are imprinted to see details on each speed (fast speed can lead to ghosting or unsharp corners in my case.)