After four years of devolopement i finally decided how Schorschs Z-axis looks like. The old four-motor-overkill-but-underperforming-axis is gone and now there are some fine ballscrews, given to me by the great Timm Burkhardt, and polished silver-steel rods giving Schorsch 295mm of the straightest Z i can make.
Although the two ballscrews are 100% straight i decoupled them a bit from the tray to compensate any shifting that may come from my printed motor-ballscrew connector. Maybe i will change that but for now there is absolutely no reason.
(sorry for the blurry pictures, when there is time i will update them)