This is a piece that i created to cool the nozzle after upgrading my J-Head to a E3D hot end. Couldn't find one that suited my needs.
This part wont touch the table or the print, also has a hole for the hot air coming from the e3d to pass through.
From the pictures I realised that the bottom part was a little bit far away from the nozzle (although mine its working perfectly) so I reduced the distance to the nozzle by 5mm.
Hope it helps other people with the same problem as me.
I printed mine with a .3 layer height with 3 perimeters and 3 top/bottom layers.