Materials: It will require 2 M3 screws about 45mm long, and 2 M3 nuts to clamp the hotend in place. The smaller part is to a 0.2mm tolerance or no tolerance. Method of assembly: Remove supports and raft (if used). Insert bearings from original X carriage into the new one. Insert nuts into embedded holes, and screw bolts through the clamp to attach E3D v6 tightly into place. Attach the end stop to the X carriage (recommended by hot glue - if you want holes in design either drill them or ask me and I will change the design). Pass linear rails through bearings. Attach belt to slots at both ends tightly, and you're ready to print!