Okay thanks for the link and for letting me know. I may reach out to Doug.
As I mentioned, I began using the Tascam DR-2D during this past year. I really like the small form of the Marantz. The Tascam unit is a little bigger.
For those that have and use the concert mod, is the upgrade worthy of doing? Will I hear a noticeable difference over the Tascam? Currently my thoughts are the Tascam performs slightly better than the stock Marantz.