Not a coding issue per se, but there seems to be substantial holes in the documentation, see http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1273247-buildcraft-nextgen-6-0-17-builders-blueprints?comment=21317 and http://mod-buildcraft.com/forums/index.php?topic=815.0 for reference.

Wiki has been updated actually. Closing.