Wanted an easy to print extruder with a bearing...I had a lot of trouble printing other extruders, so wanted something a little easier to print. There are no nasty overhangs, all holes have internal bridges to reduce reversal and confusion with seperate towers. There are little flanges around the base when printing too.So it'll take a bit of drilling out and work with a craft knife to remove the surplus. But it cleans up well and works great.This requires 2 bearings: External - Internal - Width 17mm 6.25mm 6mm 17mm 9mm 5mmThe hinge for the arm is M4, as is the bolt through the spring.The SketchUp file is included if changes are required. It should work as a template for anyone else wanting to make an extruder in SketchUp.