The diagram top left page 10 is intended to show the overlap of deck and bottom sections to allow for sanding down to get a neat fit but didn't quite come out as well on the PDF conversion. Thanks for pointing this out. I'll re-do the drawing to emphasise the point.
Bulkheads B1L and B1R fit either side (left and right) of the longitudinal stem bulkhead about half way between B2 and the stem, the actual position depending on the forward section profile and are required to provide a bit of curvature to the hull side.
And as for 'transome' ............
Corrected in master copy!
Iain