Parallelogram-Manipulator-Toy

Hello
This is a parallelogram manipulator (a robot without a computer) in toy scale. It shows how a parallelogram linkage with pistons could work.
I tried to clean this up, make all parts fully 3D printed, and test tolerances before sharing it publicly. I hope you can print it without issues.
If not, maybe you can create new profiles or share a comment to help others. Thanks!

Be very careful during assembly and use, as things can break easily. I recommend assembling parts one by one and then combining them all.
You will also need a 4 mm Allen key to insert a screw into the base of the manipulator. 
Also it would be better to use steel screws, but since many might not be able to I decided to make the screws printable. That or maybe a better filament would make it more stable.