Hi,I purchased a Columbia 31 yesterday, never sailed in my life but thought it may be fun. I plan to spend the next few weeks cleaning and refitting and perhaps taking a course on sailing. The hull number is 97 and I have all the documentation from the original purchase, from the Columbia website it looks like it may be the last "31" built. Any information on conversion of the Atomic 4 to diesel and the approximate price would be appreciated.John