M_Boats: New M-15 owner...

I just purchased an 82 (or 83) M-15. I'm hoping to put her into a lake tomorrow to try it out. We'll have to clean her up a bit but she seems to be structurally sound. Got a couple of questions though. How can I check out the centerboard and associated hardware? On the trailer I can't drop the board. Also, how can I determine the boat's build sequence number? I'm sure I will have many more questions and I appreciate having you all on email. Thanks, Dave Rossi