The next video shows the half made Mark II tracking accumulator. I try to make it as low tech as possible. The following video is a model of the accumulator with 2 dishes counterbalancing each other. This would work in the tropics but may cause difficulty as you go further north or south. File:Revolutionary Solar! Stirling engine mount + Liquid piston tracker The tracking solar accumulator design now has everything it needs, good tracking, balance, and it is on equatorial mount which is the same all over the world. (Just the angle of the axis it turns on changes with the latitude)