I recommend printing this rail facedown, the STL is already facedown and rotated to be able to fit the bed on an Ender 3, so it can be printed as is. If your machine can't do the bridge without issues, please leave a comment. Please Like and Follow me for design improvements. For access to the 3D Printing Knowledgebase with troubleshooting and design education, join our monthly Ko-fi membership. https://ko-fi.com/3dpkb/tiers