Idaholewis,
Great shooting and load work-up..
I also like that portable bench as the one I built years ago is a pain in the arse to haul around..
Yours give me ideers...
I used Rugged buddy saw horse legs, if you do a quick google search for Rugged buddy shooting benches you will see Lots of different ways to build a bench using these things 👍
http://www.ruggedbuddy.com/Rugged-Buddy-Sawhorse.html