I didn't have a clear vision of how to build this thing until I saw DIY Perks' fine video of his Sun-Blaster.
I bought a couple of meters of angled aluminium lengths at Obs Bygg, actually the only suitable I could find in town, and measured, drew, hacksawed and drilled away. There was more gut feeling than careful planning involved, so it may look a bit rough on the edges, but feels pretty sturdy. One point about the aluminium is that it was too porous, as it never was intended for bending anyways, so the length would crack up and break off if I didn't bend it slowly enough. If any of you have any tip on where to get some proper aluminium lengths to work with, that would be superb!
The frame for my light is pretty much built like DIY Perks' light, but will have a control panel somewhere with some extra knobs and a battery indicator. As not seen on the photo above, there will be a gap of a centimeter or two between the heatsinks to allow for the hot air to escape between them, otherwise there would be little airflow in the middle.
Also, no front panel to hide the wires and heatsinks.