Axis Z upgrade lead screw Prusai3 R2

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Upgrade for Prusa I3 R2 by NicolaP, Italy RepRap. http://forums.reprap.org/read.php?359,669423. Design Fusion360. You can choose not to use antiwobble, but if the trapezoidal bars are a little twisted like mine, it's a good idea to install the antiwobble as shown in the picture. The TOP_Z and DOWN_Z use 688Z bearings; for TOP, you might be using KFL08 flanged bearings, but I recommend using the same bearings as above. With flexible coupler, everything works well, and there is no sign of wobble or other mechanical error. To secure trapezoid bolts, use 3.5x10 wood screws. Print Settings: Printer Brand: RepRap Printer: R2 Rafts: No Supports: Doesn't Matter Resolution: 240 micron Infill: 25 - 35%