Such a warm heart felt retraction that Im beside myself. I’d love to see the original post because my bad advice in its entirety was to suggest having a $2 torpedo level in your tool box. I left it up to the reader to build their machine however they saw fit because that was not in the scope for this book. Before I promise myself to never look at this thread again here’s a long list of other resources from Prusa and Dr Bowyer among others that discuss using the level, which again I did not do. I make this point because my fallacy was in merely suggesting you might want to have a tool not that you should actually do anything with it. Apparently all suggestions to proper RepRap usage must now be routed through Rich before further correspondance is acceptable.
http://www.reprap.org/wiki/Adrians_Prusa_Notes#Tools
http://www.reprap.org/wiki/Mendel_frame#Assembly
http://www.reprap.org/wiki/RepRapPro_Mendel_frame_assembly#Tools
http://reprapbook.appspot.com/#d0e726
http://www.reprap.org/wiki/Prusa_Mendel_Assembly#Assembling_the_Z-axis
ftp://reset.etsii.upm.es/projects/3dprinter/Prusa%20Mendel%20Visual%20Instructions%20(Mininum%20Resolution).pdf#page=61
http://daubers.co.uk/tag/reprap/
http://daubers.co.uk/2012/11/11/look-its-moving-its-alive-its-alive-its-alive-its-moving-its-alive-its-alive-its-alive-its-alive-its-alive/