sliding block for 12mm graphite bushing

Summary Modified sliding block to support using Robotdigg's 12mm graphite impregnated bushings for 8mm rods like what used in ultimaker. http://www.robotdigg.com/product/175/Selfgraphite+8*12*30mm+Linear+Bearing http://www.mcmaster.com/#99397a772/=136f33q Print Settings Rafts: Doesn't Matter Supports: Doesn't Matter Notes: If you use enclosed build chamber you should use ABS or Nylon for this part.