The work has been finished and a changed table of offsets has been calculated.
The original Dudley Dix design of the DIDI23 was altered in order to gain freeboard and headroom. The freeboard was increased by 215 mm by inserting an additional stringer below the sheer strake. The cabin headroom was gained by steeper cabin walls. The cabin edges as well as the cabin chines were kept unchanged (indicated by the dashed lines 1 & 2). The gained headroom is about 360 mm. In order to keep the beam unchanged too, careful modifications of almost all bulkhead shapes were required.