Peter van den Berg has an older video on his youtube channel of a similar design in brick form. You might see more of the construction design there. That is only my opinion. http://blog.dragonheaters.com/annoucing-the-helix-a-horizontal-fed-rocket-heater/
Looks interesting Im hoping to be able to make it up there to check all the stuff out looks like theres going to be a lot of really good new ideas presented that weekend.
Very cool concept!! Looking forward to the winners and the rest of the runners up, all of them have great designs.
