3D Robotic Arm Gripper in Parts_fixed

This thing was made with Tinkercad.
This design is made to work with specific electro motors as follows:

The big part with sign MDX is to stay on top of a 2'' linear actuator.
The big quadrat is for a Stepper Motor - 4-wire 200 steps/rev, 12V 400mA
The second big one at the end of the second link is for Hitec HS-225MG - Mighty Mini MG Servo.
The other 3 ones left are servo motors: SG90 9 g Micro Servo