I been trying different ways to sort out the issue with parts 15A and 15b that are over-sized to the rest of the hull ribs, which would cause a bulge in the planking, it might not be a solution for everyone, but it does work on mine.

Take a scrap piece of timber and while pushing ribs 15A and 15b together (Towards each other) clamp the scrap piece of timber to the tops of each rib, to hole them in the correct place according to your other ribs as shown in the picture below, but be careful, if too much pressure is applied you could break the ribs.



This scrap piece of timber should be kept in place while planking the hull up to the top of the ribs, then when you take this scrap piece away, the ribs should now be held in place with no bulging of the planking.



As I said this may not be a solution for some of you, but I do hope it helps.

Best wishes
David

for thoes brave enouth remove 15a and 15b from ship the part that glues on to the main frame below deck 7to out side of hull measure in 2mm at deck level then draw line to the outside of the hull notice it is taperd cut out also trim tab when replace it should line up with deck an rest of the frames for thoes how havent glued anny thing shohld be a doddle i had glued my frames but with a twist hear and there i got them out ok may have to play around with gun supportes

It works a treat mate and I used some steam to soften them and I will leave it overnight to see if they spring back!!!

That looks like the route i'll take,i'll try it over the weekend.