What size Cascadias and what size tires are you using?

Looking at the picture above, you might be able to see that using the 29er Cascadias with 29x2.0 tires I am at the very end of the lower fender stay. I had to pop off the rubber cap, but I had just enough room. My Muirwoods is the 17" size. It may be that if you have a different size the eyelet is in a slightly different place.