I have used the DeWalt beam stand for many years now. I had to drill custom holes in the mounding brackets for the Kapex, but it works great. For mobile work, it is very easy to move and set up. In the shop, I leave the Kapex on the beam (with legs folded up) and put the beam on a row of drawers. In the shop, I added a wood fence with a Rockler rail with rule and flip stops. The wood fence rests on the left extension support of the stand, and attaches to the left side of the Kapex, which makes for quick, accurate, and repeatable cuts.
I bought a second set of DeWalt mounting backings, which I attached to my old 12" DeWalt miter saw. I use the DeWalt saw on the DeWalt rail stand when cutting 2x4 or other "rough" lumber that does not require the Festool quality cut, and then put the Kapex on when I need finish trim quality cuts.
Highly recommended?