Thx gents for all likes and comments.
I started with the fwd SB gun port sill.
First I marked the proper height.
Next is to saw away the frame in between with my small Japanese saw.
Now file angled edges on the sill and contrasting slots in the frame and glue in the sill with pva.
Before the glue is dried file the sill so it follows the shape of the hull. If you file it while the pva is stil wet the saw dust enters into possible openings in the joint closing these and creating a perfect joint.
Now finally some plankings on deck. The waterways are fitted in place. I glued them in place with CA and black pva between the joints.
Now the construction should have enough strength to start the second big cut.
I have marked all the cutting lines with a knive using the template provided.
Again my small saw comes in handy cutting down frame by frame. I saw just above the marking so I can fine tune the frames by file when al are cut.
Working slowly foreward leaving some frames in between for rigidity.
Now the bow is completely freed.
Working towards the stern I leave a strong three double frame in place which I will remove at last.
Next time I will finish this cutting proces, now just some dry fitting.