I just changed the way my dust foot attaches to my PRS Standard. I made a new foot when the one from shopbot broke. I still was using the rod that goes into the Z and would ride up and down with my spindle. What I did was take a 3/8 X 1 inch piece of flat aluminum and machined a grove in the middle and put a 90% bend in it and bolted it to the foot. Next I drilled 2 1/4 20 holes in the stationary side of the z and used some thumb screws to hold it. Now I can set the foot to the top of my material and it stays there.