First of all, note that if you start a new thread, rather than reply to the
existing one, your message isn't associated with anything, and in general,
nobody will know what you are talking about, or whom you are addressing. If
this message was meant for someone named "Rich," there's a good chance that
he won't even see it.
However in this case, the answer is an easy one: "ymmv" is a common
abbreviation for "your mileage may vary."
