"I’m going to keep digging until you look me in the eye"
Are you sure you want to do that to engineers? There's a joke that goes something like:
How do you tell an introverted engineer from an extroverted one? The introverted engineer stares at his/her shoes when talking to you. The extroverted one stares at your shoes.
I don't think it's a good idea to "keep digging until you look me in the eye".