The RepRapPro Huxley building instructions are really painful.
The part lists are different from the referring part list photos, some of the screws from the list are never mentioned in the text and some mentioned screws are missing in the kit (well, this could be a shipping error). The hot end assembly e.g. leaves us with some screws never used and a nice sentence about two screws that should have been mentioned before but are not: http://reprap.org/wiki/RepRapPro_Huxley_hot_end_assembly
It will be a miracle if we get this working in the end.