I just received the product and did a pre-test. I had a job doing similar tests with over 30 years of experience. Before buying, I read all the reviews for this product, as well as for an equally cheaper product. The difference is that for $4 more I got an extra plate and 4 1/4-3/8 jacks. Whilst researching counter plates and clamps, which proved to be a problem for many, here are my findings. In addition to the two plates included with Pergear, the Mefoto and Induro plates (Mefoto 37mm x 60mm…