Hi, After a (diligent)use of slic3r, I've some perplexity about command-line functionality and slic3r configuration file documentation: 1. The slic3r.pl command-line parameter `--rotate` accepts only an angle in degrees, but the UI permits to choose around which axe to rotate (at least to correct sometimes from the STL the best orientation to consider for print) CuraEngine for comparison, acceptby MARc0 - Slic3r