I've been getting a lot of requests for build plans, so I made a 23 page .pdf file you can have for $20 (This helps compensate for the 3 days it took me to make them). You can get them here: http://bit.ly/HHOParts
Everything you need to know should be in the video, but the plans have templates for the stainless steel plates, a parts list with SKU numbers, pictures, instructions, and expanded view diagrams of the systems, including an alternate "all ABS" option.