True Bertram aficionados will quickly point out the similarities between the 450 and the original Bertram 43. The company did base the boat on an extended version of the'43's hull, but there are significant differences, including a whole new superstructure. In the process, the company made a single-piece deck and cockpit rather than the three individual pieces (deck, flybridge and hard top). Molded construction makes the boat stronger and easier to build. Add to that another big construction chan-e ? Bertram has gone back to adding strengthening ribs up the sides of the boat inside the hull, just like the old days.