Ah, I remember that boat very well indeed.......If its the 'no worries' that I remember I used to race that one with Derek Basham in the late eighties early nineties.
Had a Yam 90 on the back of it in those days.
Ah the good ole days of OCR............Girls, drinking, partying and racing.
Many a summer of dreams.
Unfortunately cant help you with the reference numbers still though
I hope that your mates allright after that slight mishap!!!!!
Good luck though