Is there a way to send personal messages to another user on
TeX.SX for some aspect of a question you don't want to be made public?
Obviously I don't have the other user's email address and he doesn't have mine. So how do we do it?
My suggestion is to invite this person to a personal chat (albeit public) where you can hash out some ideas and/or exchange details, since similar requests have been declined in the past. This way you're guaranteed to connect to the specific individual (if they have a chat account) rather than waiting for them to enter the main chat area, or via a comment to one of their posts.