I believe this is something fairly simple, but I am just a novice & are having trouble figuring this out. Hers is my problem. I have 2 plates horizontal and parallel to each other, approximately 6" apart. They share a common pivot point equal distant from the top & bottom as well as left to right. What I’m trying to attempt is to have is to top plate rotate the same degree as the bottom except opposite. In other words. Using the right side as an example, If the lower right plate angles down 10 deg. the top right plate will rotate 10 deg. up. If anyone could help me using gears to have these plates pivot in equal amounts in opposite positive directions. ANY and all help and comments will greatly be appreciated. Thank You. Jerome.