Bunnings stories:
Asked for vernier calipers. Blank look. Described what they are and how they work, still blank.
Asked for o-rings, blank look. Expert came, he at least knew what an o-ring was....... smiled heaps and showed me they sell only bulk packs with 20 different sizes. It was a for a windsurf breather so I said possibly imperial to get the right I.D (wasthinking Chinook stuff).
Expert needed me to explain "imperial", then proceeded to tell me "it does not matter how you measure it, its the same size"
OMFG

Thread tap. Directed to plumbing, I knew that was wrong so I said no, its for cutting threads in a new hole in a bit of metal. Scowl received, dirty look like how dare I question them, and "I told you, taps are in plumbing....."
And to almost every question: "this will do"
No it won't idiot, I specifically told you I am doing a specialist thing/ precise thing / certain material needed. No, It won't "do".