My version of YRUDS bowden extruder for RichRap's 3DR delta

My version of YRUDS bowden extruder for RichRap's 3DR delta

BOM:

Mount:
- 2x M4 10mm screew
- 2x M4 hammer nut
- 2x M4 washer (optional, I did not use them)

Idler:
- 1x 626 bearing (19x6x6mm)
- 1x M6 25mm screew
- 2x M6 washer
- 1x M6 nut

Spring mount:
- spring ID 4mm
- 1x M4 screew (I used 44mm long, you should use good one for your spring)
- 2x M4 washer (to secure ends of spring)
- 1x M4 washer
- 1x M4 nut

Stepper mount:
- 3x M3 x 13mm scree