allright doing some investigation
seems the drives on these things are bulletproof and if Im lucky and mine is the upgraded nmea version I can use a newer different brand control box and it will still work
here is a pic of the S DRIVE motor box...seems the s drive is bigger than the M drive from ebay pics
now I havent located the control box...maybe its in one of the lazarattes or mounted near the motor drive
if not there are a couple ebay auctions for m controllers...wonder if they will work with the s motor kit?