We have found that the EX3 mount from VF Gadgets is excellent. Check it out at https://www.vfgadgets.com/Heavy-Duty-Base-Plate-for-EX3-with-Back-and-Shoulder-Plate_p_127.html
Don’t know how it compares the one from WestsideAV…..
Jim Hurwitz
Director of Product Manaagement
Telecast FIber Systems