It has been a while since I have done an update - and - I apologize for that, and also for not giving as many details too. I assume that since Zoltan is also building this model, you also have his BL to see as well. So, I am not sure if I have as much to offer.
At any rate, here is where I am - although, I can offer some details that I see as beneficial if you want to pursue it. This is a small detail, but to me, I found it beneficial and it has to do mainly with the Keel (and also other parts that are sandwiched together).
The image below shows a typical LASER cut, and as we all know, the LASER is going to produce an angle. That angle is not too much to worry about in some cases. However, the thicker the wood, the more problems that can be. Therefore, I assume that this is why the keel in made in a manner that must be sandwiched together (parts glued side by side).
Therefore, if you study the image below, you will see that I have THREE different ways those strips can be glued. The first #1 shows that there will be a positive bow (or hump) in the middle. Therefore, trying to file this FLAT can be a guesswork. Next, #2 shows that the pieces are that you have two edges that will have to be filed to make even. Then lastly is my favorite #3 which shows the BLUE dots have TWO reference points that are on the same plane - and actually, when these parts are NOT filed, you will have a trough that the glue can fill into. Therefore, there might be NO need to file as the EDGES are your FLAT reference points.
And now here are some pics of where I am with building the keel. To make sure the Keel fits from end to end. I shall STOP here and start to build the OTHER END. Then bring the two ends (bow part and stern part) together and see how they meet. If I have excess, then that can be eliminated. If I built the entire Keel, there is a possibility that I might have a GAP on one end. (the Gap just means that the entire keel of course is longer than the hull. Not enough, I can fill that in with a shim of wood.