Jim Kirk, Thanks for the advice, about 25 years or so ago I built a bench similar to what you described out of 4X4's with an indoor/outdoor carpeting on the top, out by my personal desert range. I had the opportunity to use it about 4-6 times before I came out and found some idiots had used it for target practice, and later noted, those same idiots used it for firewood.
I've since bought a portable table (20+ years ago) from, I believe Cabela's, that isn't as sturdy as I would like, and at the same time is relatively heavy and only measures 21"X28". It assembles fairly quickly as well disassembles equally as fast. With all the parts involved in the Stable Table, I do believe I'll just hold on to the one I have. I only set it up to check my loads with a chronograph, and sight in various rifles, no competition target shooting btw.