Issue 27 has the addition of cannon supports and the cutting of the gun ports for the middle deck.
There are 15 middle deck gun ports on each side of the hull, the ports are positioned between the hull frames - except in the case of the ports closest to the bow, which are in line with some of the bow formers.
For the Cutaway - Repeat the main steps to cut the gun ports on the opposite (port) side of the hull, simply ignore the gun ports that would otherwise fall in the area which you have left unplanked.
Marking of the middle deck gun ports - Use a strip of wood to draw a line 4.5mm aft of the frames for all frames except at the stern and bow.
At the stern, draw guidelines against the sides of frames 27 and 28.
At the bow, draw lines against the sides of frmaes 12 and 13, then redraw the line nearest frame 15, moving it 2mm forward of the line you first marked.
Mark the height of the gun ports, which are 31mm above the bottom edge of the lowest plank, repeat at every port position, including the entry port.
Using the 12mm square jig you made for marking the lower gun ports (issue 23, page 12), or a ruler, mark the gun ports according to the magazine diagram, not forgetting to mark the port against the forward line at frame 15.
Extend the vertical lines both up and down to mark out the entry port between frame 21 and 22, you can leave marking the top and bottom of the entry port until later.
The gun port between frames 27 and 28 should be flush with the edge of frame 28.
The gun port by frame 25 should be drawn approximately 1mm closer towards the bow than the marked line.
There is one further port to be marked at the bow, draw a line 31mm forward of the front gun port next to frame 12, then mark its height as you did with the previous ports (31mm above the botom edge of the lowest plank), then mark out the 12mm square.
Cannon supports - Take both of the 6x4mm wooden strips, paint one side black, taking care not to get paint on the edges. When dry mark out and cut 24 pieces 20mm long, and 4 pieces 15mm long, a razer saw and mitre box is best used for this process.
Using PVA adhesive, glue the cannon suports on top of the middle deck support beams, and position with the black-painted side facing the planking, line the supports up behind the gun ports that you have marked, to ensure that they will provide good support for the cannons.
Note that the shorter blocks (15mm) are for the bow and stern positions, allow to dry overnight before continung.
Cutting of the gun ports - Centre mark each gun port, and then using a 2mm bit, drill a hole through the centre and into the the cannon support. Holding a ruler against the underside of the deck will help you keep the drill upright and parallel to the deck.
The cut-out and finish each the gun port as you did before, but at this stage
DO NOT cut out the two entry ports which will be covered in the next issue.
Issue 28 contains planking/pins, and has instructions for the cutting of the two entry ports and continues the planking upwards.
Issue 29 contains planking/pins, and has instructions for the cutting of the gun ports for the upper deck.
Tomick attached the following image(s):