Hi, I have no idea where this post will end up. It is my first time posting anything. So in my mid 50's I run cnc at work Dayle , quite proficient at Mastercam. The 2020 i3 is my fist 3D printer. Took me around 24 hours to put it together. My first attempted part was a no go. Trouble shooting ? lets put a spring tension-er on Y axes. That's it, it run perfect. As a tool maker and we have a 1 milby TOOLTIME - Prusa i3 and variants