This reminds me of the importance of specifying tolerances on engineering drawings - I once received an excessive quote for a part (several hundred dollars for

This reminds me of the importance of specifying tolerances on engineering drawings - I once received an excessive quote for a part (several hundred dollars for a small, simple Aluminium widget) and it took a while to figure out that I'd not added tolerances and so they had assumed I needed it exact to the micron. I added the tolerances in and the price dropped to $70 or something. Clear communication is so important!