hi Paul you would normally in my experience put the rear three boards in with the locking strakes with the boat slightly inflated ounce in place concertina the two front board ie arched up then push down untill flat and then inflate the boat fully

David -we have a Zodiak S.131 (1993 approx) - 4 of the strakes are broken - any idea where we could get more strakes? Our floor is 3/8" wood and the strakes are about 25" long and about 1" wide.