Ah, the captain's and officers quarters are next! One of the highlights of the kit IMHO. I started to assemble the wall panels, with their recessed and beveled inserts, which was very difficult for me to do. I could think of no way to automate or simplify the process, nor make it more accurate, so did what I thought was a decent job on one of the walls. Still, with the gap from the laser, the light indicator lines that were sometimes there, and sometimes not, after sanding, I wasn't that proud of it. When doing the next panel, I realized that I was happier with the plain recessed panels than I was with the ones with the added beveled panels.
Since I had intended to paint the captain's quarters walls off-white, I did this to two panels to confirm my choice:

Done properly, by Uwe and others building this model, and especially when left natural wood, the inserted panels look very good. But I was not as happy with my result, so have reasoned that the poor Bomb Vessel, considered the ugly ducking of any flotilla, might not warrant this fancy woodwork. But rather the simplicity of only recessed panels. The Captain is a practical man, and agreed with this decision.
IMPORTANT: Those who include the recessed panels, that is, pretty much everyone but me, understand that they are ALL different in size and shape. Panels that look rectangular are usually not quite rectangular, and size variations one to another are TINY! It's best to keep them in their relative position when working on them, or mark the backs accordingly, to insure they go into the correct position and orientation. The center top panel is an example of this - it should have been turned 180 degrees.
In part 2 of this kit, the beam supports (2A-3) for the quarterdeck were installed:

It was pretty much impossible for me to install these using the positioning template, although I did my best. The templates never fit very well for me. Some I think I've posted previously were impossible to place due to material or part interference. When I did similar work on the foredeck rooms at the oven level, nothing lined up very well, requiring a lot of trimming of wall pieces to fit. After doing those rooms, I had zero confidence in the above supports, so removed them from the model, damaging one and destroying the other. But I reasoned that I'd be better replacing them when I was able to get proper measurements from the captain's and officers' rooms. I'm very glad I did!
Since I was so concerned about 2A-3 above, the location of which is determined by both the height and location of the cross beams, which in turn must match the rooms with their notches, I started by comparing the wall panels with the drawing showing the beam locations:
Placing 2 longitudinal walls together, the notches seem to match up well:

But, you know what's missing? The transverse bulkhead that has to go between the two panels!
Simulating the width of the bulkhead with 3x2mm strip (the bulkheads are comprised of three 1mm thick pieces), this shows the result with an unmodified Captain's berth cabin wall:

No way will this work. The wall to the left above will need to have 3mm trimmed from the fore end, as shown marked here:
BTW, comparing the wall size and location in the kit with the locations shown by Goodwin in his AoS Granado book, it comes out quite close:

The walls are too thick, of course, but that's necessary to provide the 3D effect on them, so quite worth it.
Here are all of my final panels, without the inserts as described above:

The 3x2mm strips are not accurate per Goodwin's drawings, and IMHO are way oversize, adding a scale 7.5" of thickness to an already over-thick wall, but they seemed to look good, adding detail to help with my removed panels, so I used them. The instructions show these in 6 locations on both sides of the main transverse panel above, with the attached longitudinal walls, where they connect, beside them. I felt this very unnecessary, and left them off of connection areas. So on the aft side, B was left off (one was actually added back), and on the fore side, A's were left off, as walls connect there.
With the wall panels built, I could place them temporarily in position and plan the location of the beam supports:

Here most of the cabin deck inner wall planking has been added.
Perhaps this is a good place to discuss a difference from my model and the kit parts and instructions. The instructions show the following layout for walls under the quarterdeck:

Goodwin's drawing for this area is:

CAF and others have assumed that the wall between 17 above (Captain's Day Cabin) and 18 (Captain's

ing Berth) extends the entire way from the starboard to the port side of the ship, and the wall between 18 and 12 (Captain's Dining Space) is duplicated making a corridor or hall. Accompanying text indicates 19 (Master's Cabin) has a mirrored Lieutenant's cabin on the other side. But clearly, portions of the aft wall are not shown on Goodwin's drawing, and if the arrangement were as CAF interprets it, 12 would be called a Corridor, and a note would be included to say that the Captain's Dining Space was opposite the Captain's

ing Berth.
Therefore, I and others (most notably Uwe, whose excellent build thread also discusses this and comes to the same conclusion) have elected to eliminate one of the walls, and shorten the aft wall, resulting in the outline shown in red on this modified sketch:

This results in a large dining area, open to the Captain's Day Cabin and IMHO agrees with both Goodwin and the layout of many larger ships, which is somewhat standardized.
Continuing...
Unlike the original 2A-3 beam supports, which were notched to fit the cross beams, I decided to leave mine flat, so I could position them to fit accurately in all the partition notches, and place them where needed, instead of being limited by the notches. Using the above setup I could accurately determine the location (height, in particular) of the support beam. Here, I've glued it in place and show the original beam laying below:

Incidentally, the original beam measured 2.5mm square, but lacking that I used one of the 2x3mm strips.
I intended to finish the captain's cabins floor and walls differently, so had to accurately find the location of it, determined by the partitions:
Once located, I painted the walls off-white (actually AK Silver Grey):

Many of the walls and partitions of captain's cabins, as well as some officers', were painted white, beige, light blue or green, or other colors, to lighten the space. This can easily be seen in photos of HMS Victory and other tall ships. While the Granado may not originally have had this done, the Captain certain had enough spare cash to buy a gallon of paint from the Ipswich Home Depot.
Also, the Captain was a bit sensitive about the fancy cabins and floor covering of larger ships. Bomb Vessels were generally considered the ugly ducklings of the flotilla, so were not always so fitted. Granado, however, had an ornate square stern in contrast to the round undecorated sterns of most bomb vessels, so perhaps she deserved a bit more flair. The Captain certainly agreed, so perhaps purchased some chequered canvas to liven up his quarters:

On other British ships, the flooring was not painted, but rather printed fabric was applied and probably nailed to the floor in the Captain's areas. On the model, this was simply some checkered fabric purchased on eBay and cemented in place with white glue. Most often I have seen, especially on smaller ships, that the stern wall woodwork was not painted, so I have left it natural. Not sure what, if anything, I should do to the window frames.
With a coat of off-white on the captain's area walls, and door hardware installed, the final was are ready for installation:

I went with the L-shaped hinges rather than the cast ones, as I saw no way of mounting those hinges, nor bending the brass strip around them, and have it come out decent. These hinges may look upside-down at the top of the doors to you. They do to me, but I reasoned that these are removable panels, and the doors should have to be unmounted quickly, so hinge pins pointing in the same direction would allow for this. The instructions showed locks with only the end of a brass nail as a "knob", but this looked undersize to me, so added the small brass circles (hope I have enough later for whatever they're to be used for). And just added these circles on the side of the door opposite the latch to simulate a knob only.
Here I've added a hatch surround simulating the hatch to the breadroom below. The Cap'n made sure fabric was added over this hatch as well, matching the floor:
After addition of a couple rings on the breadroom hatch, and a two of the quarterdeck cross beams which help to locate and retain the walls, we have:
Now I'd like to add just a little detail to the cabins, perhaps a table or desk. Just a few items, I think, to generally indicate the purpose and arrangement of each room. If I do too much more than that, readers will think I'm trying to compete with those fancy rooms like on the Royal Caroline, with inlaid tables, silverware and photos on the wall, which of course are well beyond my capabilities. No, I want you to
think I could do those if I wanted to, but decided to construct a minimalistic approach to the area instead!