We have finally gotten around to modifying that particular Bell Crank design. Now, our arm is able to go down all the way to right above the base of the trolley (where the pneumatic units will be parked) and is able to go up to the height of 3m. Hurrah!!!

Over the past few days, we have also managed to attached the Arduino + two dc motor controllers with all wires to our 3d-printed housing on the primary arm. This is a close up.

This is a shot from farther way

.

We also connected everything to the battery, placed on the base, instead of the power supplies