Alastair
I must disagree with your comments above, you are employing General Hindsight. It is quite easy from 2012 and look back at others efforts that with the benifit of the officer quoted. Circumstances, mind sets, proceedures, the imperatives of war make decisions that today we may conclude were wrong. Of course some aspects of AFV design are not, err what shall we say 'not quite right'. To lump it all together in a sweeping statement is a little harsh on those engineers who did not have all the technical advantages that we have today.