There are quite a few topics that talk about workspace prep, tools, materials and other supplies. In the long winter of the beta and pre-release, we had plenty of time to discuss this.
Calipers?
Masking tape?
Magnets (they still are useful) but print the holdown pins right away.
rulers?
CA glue?
Utility knife?
Xacto?
Your place looks great. First thought I was looking at a venting setup, then figured it was waste pipe.