I see Paddy has added a second mixer:
http://www.biopowered.co.uk/wiki/Methoxide_mixer#Methoxide_mixer_design_2Love the description.
The Goat Industries logo is blurred out (EDIT: actually, it isn't - just my current crappy connection cutting the file short) - personally I don't think it matters if logos remain - we owe a lot to Goat Industries in particular, and crediting sources is a nice thing to do anyway.
Anyone got any other opinions on the topic?
Obviously we couldn't use other manufacturer/designers drawings/pics without there permission but this is implicitly given by Paddy in this case as he wrote that bit!