great pedals! I've ridden a set on one bike about 10000 miles (2 years) and bought another pair a couple of months ago for another bike.
you're correct...an allen wrench is used for the adjustment. the hole for the wrench is on the side and there's a window on the bottom showing the number.
sorry, I made a mistake. I just looked at mine and the allen screw head is accessible from the pedal platform (under the cleat). the window for the float number is on the bottom (I got that part right). its amazing that I can look at something almost every day and still not know what it looks like, but I guess I set the float and haven't fooled with it since. still great pedals!