Fed up with the tongue coming out and the Bowden tube coming adrift ruining prints I modified the extruder body to stop this happening.Parts needed; Bowden End from Components RepRapPro shop with 5mm end thread. Tapered Brass M5 nut from RepRapPro shop. M3x14 skt hd bolt 2-off. M3 Nut 2-off. Extra length of 3mm PTFE sleeving. Unscrew existing Bowden Start,place clamp over end of Bowden tube,then screw on Bowden End so that it is tight,ream inside of tube with a 2mm drill as original Ormerod instructions to achieve alignment,screw on tapered nut and firmly tighten.assemble onto extruder block and then insert filament manually to make sure of a smooth passage. I have used this for several months with no problems and you do not need to unscrew the clamp when changing filament Acknowledgement to Mr Burns(RepRap forums) for the originally modified extruder block using the longer PTFE sleeve.