Let us not forget that someone, somehow, somewhere, has to program this thing. So, anyone making this from the inventor's instructions/schematic/pcb_layout (hopefully this stuff will be shared), still needs a way to program the flash, as well as the appropriate files with which to actually do the flashing!
And, if you bought it, you are limited to only those proggies that is contains Of course, since it contains "all" of them (almost), that may not be such a problem.
Just foor for thought.
Charlie
PS. DIP switches are ok, but I hate to see the manual for all the possible combinations!