Summary

quick, cheap, easy, and no waste due to supports
i like to copy and paste it in my slicer to print as many copies at one time that I need.
the small vs large is in regard emitters' base size. The size difference is only slight.
passthrough is for bases in which the line passes through the base. These are large.
the straight and right angle non-passthrough's are small.

You don't need to support these supports