This is a Syringe Excavator. You need no screws to assemble. Every connection you print your own Bolt. The Name of the STL Files include the number how often you have to Print.
For the "Remote" Control i used in the first Step 8x M4x16 Screws...but i will redesign with Bolts, so my concept with no Screws will be forwarded.
It is still a working Process, because i change for improvements.
EDIT 26/04/19: New Bolts are designed
EDIT 02/05/19: New Base, because of a constuction Issue...you won't be able to insert the Syringe Ring