0.3MM Layer Height or higher resolution, 20% Infill, No-Brim (Or Raft), No Support needed for any of the parts.
NOTES
1) Print with 3 Walls (Perimeters) or more.
2) Multiple Designs/Forms per STL file
3) STL file is the full assembly to show how to assemble, for printing import the model in slicer, right click > split to objects, then print
The author marked this model as their own original creation.