I never know what may come from a meeting. Simply listen to what they have to say. Offer snap shots of your ideas. Ask open ended questions. Try not to answer with details. Answer with general concepts and possibilities.

You are trying to gather information and measure their interest level. Work toward another meeting where you can bring more detail.

This may be covered in the original agreement. I likely carries some terms forward. With this in mind, you can start renegotiation talks.

We are developing a system. We like people entering the field. The system is a clean technology and is fun to work on. If you would like to meet and discuss, no commitments. We program and develop our own firmware.