You only need to take the 2 half pieces, add a short beam in the middle, just the section that can be seen, and reglue the floor planks as Olha did. That will be very simple.OK, so the improper looking floorboards have been nagging me for two weeks, and not I think I will spend the time to remove them and rework the floor boards (turn them over and use underside) to correct the nails and location of frames underneath, especially in aft cockpit where the plans are wrong on size of the bailing well located there. And hopefully get mine more like the way Olha shows in her online build. I still don't like the bright yellow shellac color, but I will make some adjustments to what I did, based on her last online posting where she showed how just stain makes boards look dirty, vs using thin CA as wood sealer first then adding stains to adjust shade of wood.
Concerning the nails position, I can't see them on your picture, or they are too small or they are out of focus. Nevertheless, if that bothers you too much, then you will have to take off all the planks. Something that I will probably don't do. But that's me
