Does anyone know the dimensions (mounting locations, length, depth of rail, length of peg, etc.) for the Yakima adjustable/non-sliding footbraces?

I checked the Yakima site and although the mention other yak equipment, there was no sign of the footbraces. I'm trying to plan (first pass approximation) the location of the footpegs in my daughters yak, but without the dimensions there is not much I can do without the braces.

coop