I wish that programmes like this would go deeper into the engineering and mechanics, but realise this would not interest a huge chunk of the potential audience. Guy is very skilled, motivated, enthusiastic and yes, mildly irritating at times, but if he is the type presenter which a programme like this needs to get the backing to make it, then that's a price I accept!
Dibnah was superb, fantastic draftsman, illustrator and calligraphist too.
Steve Williams (The Fast Show) did a great job of presenting "Off The Rails" and "Industrial Revelations", as did Chris Barrie (Red Dwarf) on Massive Machines, adding a bit of humour but without belittling the subject matter.