Finally back on track after taking about a week off due to some medical/health reasons! Today, I finished designing the complete rack-and-pinion servo gripper in Onshape and integrated it into the full mobile robot assembly. The CAD model is now 100% complete, including the multi-tier chassis, ultrasonic sensor mount, motor driver, and gripper mechanism. Since all the CAD designs are ready, I really need 3D printing grant support/help now to get these physical parts printed so I can start assembling the hardware!