The other day I took a drive out to Napier near Cape Agulhas to interview Kevin Doveton. He makes exquisite model steam and Stirling engines from his home workshop (to watch a video of one of Doveton's Stirling engines in action, |click here). This good-natured lateral thinker perfectly illustrates the kind of person I’m talking about.
http://www.popularmechanics.co.za/article/power-play-2009-10-01