Hi Popeye, thanks for your comment and sorry I took so long acknowleging.
Some further progress, FIRST what I am about to show and discuss here is absolutely no reflection on Donnie or his skills, it is a common mistake that I have done myself on two models already.
The picture at the top of this page illustrates the problem that I'm sure many modellers have created inadvertantly, shaping the stern not using a plank to test 435 angles when sanding the bulkheads, as I stated I have done it twice!
So, how can one fix this "problem" a lot of cut and paste, cutting small pieces of wood, shaping then pasting(glue). (664/669) shows how I fitted the planks onto the stern keel. I had originally mitred the ends to line up with the dark line down the centre of the keel but the glue did not hold (even using CA glue). They needed a greater surface to adhere to, hence the alternating pattern.
(665) They alternated to this stage, now because the way the bulkhead, middle of picture, actually second last bulkhead of ship, was shaped it caused the planks to sit a bit higher, consequently at the triangular gap the planks are 4mm higher than the keel, solution = a lot of cut and paste! (666/668)
(667) This is one of those Mmmmmm! moments when the strip one labouriously trimmed and shaped got broked while taking it out after a dry fit that was way too tight - TWICE! there is another one on the other side of the hull. I am sorely tempted to put a piece of masking tape underneath and the fill it in with wood filler.
Dear reader, this is what makes this such an annoyingly frustrating but so damningly enjoyable a hobby.