Watch the video. This reminds me of the "good old days" of Dynajet http://hobbyking.com/hobbyking/stor...gine_34_Red_Head_34_with_Ignition_System.html ...Tiger
I saw this video review of the Hobby King pulse jet you posted and thought you'd also like to see it.
This video from the same guy about making your own reed valves with a table salt chemical etching process is also interesting.