you can do either... dremel off the excess to clear the skewer knob, or just mount to the QR skewer. here's a wald with the legs mounted to the skewer on my wife's bike (sorry i don't have a close-up). i could have used the extra eyelet on the dorpout, but didn't feel like doing all the extra work of dremeling the leg:



actually, this wald is sitting on a front rack, but is being doubly supported by its own legs.