Rebelix X-Carriage Plain Bearing KU 0820

X-Carriage modification for Plain Bearing KU 0820

V2 with exact 45mm x rod distance

31.3.2017 added "lite" version for rebelix X2 single extruder (x-carriage_GT2_Plain_Bearing_KU_0820_Lite.stl)
and "ultra lite" for others (x-carriage_GT2_Plain_Bearing_KU_0820_UltraLite)