I've been working on this too.
I think my approach is going to be one of honesty.
"Brothers, it makes me feel good that you asked me to meet with you. I have to confess that I am having some doubts. I think it comes down to trust. I don't feel the trust for the Governing Body that I used to have. Some of the changes I've seen over the last 35 years have me really worried. I'm not sure that I want to discuss them with your right now, because I don't want to put things out there that might cause you to doubt. I have resisted discussing this at length with my wife and children, because I don't want to hurt their faith too. I have prayed a great deal, and am waiting on Jehovah to help me. Anything you can do to encourage me is appreciated."
It's a work in progress...