Dunno why some people appear to be getting upset by using a Magnetospeed on a stand.
I bought my MS from somebody on the Campfire, essentially new, for a very good deal. The "stand" cost me $50 at a local store, and between them I have less than $200 into the project.
The concrete benches at my local range are similar to the one in the photos, but just enough longer that by setting up rifle rests a little farther back, the MS works fine. The same thing works on my Stukey portable bench.