If interested in a complete description of the HMS Warspite construction see my Youtube video slide show. The 1:72 E.III and Nieuport 28 are 35 years old and recently rehabbed.
Titanic was my first build in over 25 years. It was an eye opening experience with much experimentation on how to supplement photoetch brass with other materials to improve detail. Case in point was the use of aluminum window screen wire for the funnel stay cables. Only thread was supplied in the kit and the instructions suggested an extreme installation using sprue bits etc., not to mention having to straighten out monofilament thread. I thought, if a suitable scale wire could be found it would be easier to install the stay cables using the holes molded into the funnels and boat deck after installation of the deck and funnels instead of before (as the instructions suggested). I discovered that pulling and smoothing individual threads of wire from aluminum window screen would do the trick. Tedious work preparing the wire, but no worse that drilling out every port hole by hand, and I think it paid off.
One other thing I decided in mid-build was to add some lighting, but how? I built a channel of cardboard with 11 LEDs (from Evans Designs) wire snaked into the hull through the forcastle deck and leads out the hull bottom. The effect turned out fairly well.
Lessons learned carried over to the HMS Warspite where more improvisation got decent results. If you have seen this album before you might notice that the photos have changed. I had to delete some due to data limitations, but now I am a Silver member so I have added the first 5 photos back. I have not figured out the means to order the photos - maybe there is no way! Anyhow, the first five show various stages of the build of the bridge deck assembly. Other assemblies like this took place and then all were affixed to the deck. Like I say, planning ahead is essential. As noted above, if you need more see the YouTube video.
To do over again I would search for wood decking for the Titanic - if ever I live that long! But one thing I did do was remove the kit supplied stairs and replace with PE stairs left over from my BB35 build (you can view my album of BB35 or go to William Blecke Youtube).