This is not directly tractor related, but I'm sure somebody might find the info useful at some tractor related application... I'm trying to design an articulating arm to mount a monitor to the wall by my recliner so I can sit and type in comfort. I need the arm to be able to bend horizontally at the point where it attaches to the wall, about halfway down the arm and at the end of the arm where the monitor attaches. I also need the arm to bend vertically with spring support along the last arm segment. I'm trying to figure out how to calculate what type of spring I will need to counterbalance the weight of the monitor and how to position it on the arm. I'm trying to decide whether to make the arm segments single beam or double-beam.