Frank,
It is always wise not to give your complete mailing address in a post in any of the Fora. Generally, the same thing applies to complete email addresses and telephone numbers. And it really isn't necessary here because all members have access to the PM system, here called Conversations. In any thread where the person whom you want to PM has a post, hover the mouse pointer over their User ID and then slide it down and click on Start conversation. It is usually wise to say something like "PM Sent" in the thread to be sure that he/she looks at the top of the screen where a red 1 should appear only to the recipient.
I don't know how many change gears make up the minimum required for an SB 9C but when looking it up in a parts manual, don't forget to include the 4 or 5 normally shipped installed on the machine. And don't forget that there will probably be some that you will have to have two or three of.