> I finally mustered the courage to start building a CLC Cape Charles but
> I'm faced with an odd problem. Instead of one sheet of 3mm and two sheets
> of 4mm okoume, I ended up with one sheet of 4mm and two sheet of 6mm (long
> story -- their mistake). This being my first crack at boat building, I'm
> inclined to do everything by the book. Hoiwever, I'm itching to get
> started and I'm not looking forward to the hassle of exchanging the
> plywood.

> Is there any reason why I couldn't use what I've got? What would the
> weight difference be? How would this affect the performance of the end
> product? Would I have to change the way the panels are stitched and taped?

> Thanks for any advice.

I built a Cape Charles last year out of 6mm okoume as i aquired the plywood for free. I used 3mm for the deck but 4 mm could easily of been used.There is no question that the boat is considerably heavier than 4 mm but I believe that once in the water there is no difference in performance. I don't know the exact weight but I am able to load and unload the boat off the roof of my car by myself.Due to the extra thickness I did not glass the bottom, the seams were taped with 9mm glass but in retrospec I probably spent too much time trying to fair out the seams, it would of been easier glassing the bottom. The 6 mm was easy to work with and there were no problems associated with bending the wood etc. I would have to say that given the option I would use 4 mm over 6 mm if I was to do it again as there was no advantage to using the 6 mm but I have no regrets on what turned out to be a great touring boat.