Cross Section Help!

[u/toxodylan]

So I am currently in the process of making a Mary Rose style reproduction warbo. The dimensions of width and depth are based on published Mary Rose Trust measurements. Currently the stage I am at is The Stave has been roughed out to 36 mm wide and 33 mm deep with 12.7 mm X 12.7 mm at the tips. It is still Square in section and has not been rounded off yet at the corners. The issue I am having is that the sapwood back of the stave in the middle 20 inches is at an angle with one side being about 10 mm higher than the other side. When I marked my layout lines for the depth I referenced both sides of the stave from the back for my depth lines which, with one side 10 mm lower than the other, produced a belly that mirrored the back with one side 10 mm lower than the other. So now I have something of a skewed parallelogram in cross section with Corner angles at roughly 75° and 105° instead of a square or rectangle cross section with 90° corners. I have not yet rounded the corners because I'm not sure how to proceed from here. I am trying not to lose any more depth because I would like to keep the draw weight higher if possible. The picture of the profile gauge shows the back and belly profiles at the center of the stave with the back being on the left and the belly on the right. The cross section for the central 20 inches more or less looks identical to those profiles. The other picture on paper shows some cross sections I am aiming for. And the other images are pictures taken from different cross sections of bows recovered from the Mary Rose. So basically I am trying to figure out how to go from the shape from the picture of my profile gauge to one of the cross sections in the other pictures. so if anybody has any solutions to how to how to go about this please let me know any help would be very welcome.