Syringe Servo Pump

Remix of the original syringe pump. I liked the simplicity and robustness of the original design, but wanted to improve on some key aspects:

-Unibody design.
-Better sized for a standard Tower Pro MG 996R servo motor.
-Twist lock for syringe, removes need for zip tie or other fasteners.
-Reduced moment arm between rack and syringe piston.
-Syringe piston bracket uses 3mm screw for improved strength/reliability.
-Mounting holes/flanges to secure the assembly with some m3 fasteners

Some areas that could still be improved in future iterations:

-The pitch of the rack and pinion seems to make the travel for a 180 servo too long for a standard 10cc syringe. Ofc this can be accounted for in the software, but u leave some additional torque on the table as well as the possibility to overstress the parts if you don't realize this and put the necessary software stops in there.

-The Pinion gear could use a little more of a nuanced mating hole. Would prefer a blind hole to mate aga