Thats not exactly the same as Harlan Hogan's now is it. If you read Harlan Hogan's instructions he said he prefers to use the pyramid acoustic foam instead of the wedge shaped foam as you have here. Also he does spell out to people how to make it for themselves for cheap. The most expensive part in the pyramid acoustic foam. People buy because they do not want to take the time to build themselves. Its not his fault they choose to buy his product. But his and yours are not the same - Acoustically speaking.