Originally shared by Volker Klaffehn
completely redesigned whole X/Y parts for a new SmartCore Iteration. Printing all parts at 90mm/s with 0.3mm layer height to see if it will work the way I planned 
https://www.youtube.com/attribution_link?a=-7PCPrG5QqM&u=/watch?v%3DzwZrD_cx3Jk%26feature%3Dplayer_embedded