Removing SRAM Red Chainrings This is almost certainly very simply, but how do you undo the chainring bolts on the SRAM red chainset? I can fit a 5mm (or 8mm can't recall now) hex head into the black screws, but they just spin on the spot. I have tried both the front and back. Some seem harder to spin than the others, but I can't work out how to remove them.
I suspect there's a sort of nut on the back, with a slot for a screwdriver.  Difficult to reach without a specially shaped screwdriver, though.