Explore the process of constructing a large-format 3D printer with a 4'x4'x4' build volume in this comprehensive video tutorial. Learn about the Massive Dimension MDPH2 pellet extruder, capable of depositing 1 kg of molten plastic per hour, and discover the benefits and limitations of using pellets as feedstock. Gain insights into adding colorants to plastic pellets for color extrusions. Examine the OpenBuild's C-Beam Tension XL Linear Actuators used to create a precise motion platform for the heavy extruder. Follow along as custom pieces are plasma cut and milled to bring this industrial-scale 3D printer to life. Topics covered include the Duet 3 microcontroller, temperature probe switching, frame construction, build plate design, and bed leveling system implementation.