This was defiantly my quickest built stirling engine. I built it start to finish in one day! I am actually quit disappointed with the power out put of this engine. It’s only about 0.26 watts. It also does not run very fast. I think this is because it does not have a regenerator. I am now working on another engine that will have a regenerator. Hopping this one will put out one watt (I have my fingers crossed)! Thanks for watching!