Wades Extruder Nippel

Yesterday I found jamesvilleneuves wades idler nut nobs http://www.thingiverse.com/thing:7219.

Unluckily this is for M3 nuts and bolts. My Wades Extruder is made with M4 nuts and bolts. So I decided to start my very own adventures with OpenSCAD.

Here is the result.