I tried that korker box and it was useless for me.
I tried the pin stuck in a piece of board to sew them, again useless.
The easiest way I've found to sew my korkers is blue tac. I'm in Australia, so I'm not sure if it's the same name there, but I just use a blob of blue tac on my desk, put the pin in it, layer the ribbon and then sew. Sooooooooooooo much easier than anything else I've tried and far less mucking around.