Never E-Knuff
I know that people have download the files for these knuff magazine racks but those people were clearly all polite to tell me that the files didn't actually work. The only reason I know is that I came to make a few more of them tonight and the tabs just didn't line up. So here is the updated version of the file which does now work (svg here)
The file contains parts for 2 knuff, The 2 left sides fit neatly together and are mirrored to form the right hand side, that way you can keep all the 'burnt' sides pointed in.