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I agree with these guys -- why waste time and money trying to make a generic one fit when you can purchase one specifically designed for your boat?

I believe the Martin platform that Phil linked to above is for the early Montauks (non-smirked hulls.) I thought I recalled the one you were considering is a newer smirked hull? If so, this would be the one you need:

http://www.martinmarinedesign.com/SWI...tform.html