I printed out all of the parts for this upgrade and then dismantled my FolgerTech i3 2020 and upgraded it and nothing worked properly after that. Eventually I learned that when you upgrade to the 8mm screws you need to redo the math for the Z axis. With a lot of time and effort I was able to get the printer working again and now it is quieter and more reliable. For the X-axis I didn't cut down the 500mm 2020 because I wanted to be able t use it in the next rebuild of this printer into a HyperCube. I printed all of the parts in PETG which makes for really strong parts.