The fluidyne mod

HEY LOOK AT THIS

http://www.moteurstirling.com/images/fluidyne_uk.gif

interesting pump, i wonder if its efficent any?

what if instead of the valves i did this;

http://www.thescienceforum.com/attachments/physics/1041d1345790386-fluidyne-fluidyne_uk.jpg;

would i get my temperature difference as indicated?

strirling motors are pretty cool, i've built quite a few of the low pressure differential types. food-for-thought,,, have you ever took a drip coffee pot apart? how does the
hot water go up to the top? the same way as your first link.