First, test the new gear and make sure the servo can achieve smooth and full 360-degree rotation.

Then, reconnect all three servos and ensure each one is functioning properly without any issues.

After that, integrate the robotic arm (built using LEGO) with the servo system and test the movement of the gripper and lift mechanism.

Once the mechanical part is stable, test the control again using WASD and servo controls to ensure smooth coordination between movement and arm operation.

Finally, make adjustments to the gear ratio or servo angles if the movement is still not stable or not accurate.