Muhammad,
Since this is the 3rd generation (at least) of this board, I wonder if you went back and counted the postings from the previous boards. I had a lot of postings on the two previous boards, but never became a registered user until this board.
While this board is probably the best of all, the first two boards were certainly (in my opinion) more "user friendly" to first-time users. The "Customized Options for Registered Users" on this board are really helpful for regular users, but don't help visiting "unregistered" users. When you switched to this board, I was very busy and didn't have the time to learn to navigate around it very well.
Have you considered acknowledgement of users based on the "calendar time" of participating as opposed to "quantity of posts"? In other words, a "one year" member, "five year" member an so on. Of course, depending upon how far back into the previous boards that you can still get user information, it may be a year or two before you could make any sense out the the "calendar time" distinction. I get a little concerned that the current titles may imply a level of expertise that may not exist (I don't think that problems acually exists, yet...so far the "heavy posters" seem to be very helpful and knowledgable)
Brainstorming Question: Would it be a good idea to put out a "New Members" post advertising the new members with limited information from their profile (such as tractor type)?