I found out about that in college. Initially I thought it was some cleaning compound in the dorm toilets. I found out later that someone had put methylene blue in brownies they brought to a gathering as a prank.
It wasn’t that great of a prank because it relies on people talking about the color of their urine well after the prank was done.
I was thinking of the Honored Matres of the scattering, whom the bene gesserit despise largely because they rely on sexual manipulation rather than other forms of control and influence.
I probably should have specified that much of that is later in the series and not in the first book.
If the CAD package can leverage GPU computing, then an eGPU is a good compromise. That way you can have plenty of power and airflow at the desk for intensive tasks, but you don’t need to lug all the hardware to the floor for interfacing with plc’s or to meetings. Although systems with good eGPU support are often expensive enough that keeping a separate desktop workstation and a lightweight laptop is competitive.
High single core cpu clock speeds and lots of ram should be the first priority for cad. Solidworks, for example, does not handle running out of ram gracefully at all.