Let’s continue with the next step in which I have transcribed the templates for the substructures of the SRB Blast Shields on 1 mm cardboard and for the SSME Blast Shield on 2 mm Balsa. This produced the step-like transition at the front end of the SRB holes, which is still slanted.
Granted, the difference in height of 1 mm is relatively low, but significantly, and thus corresponds approximately to the real state.
And the two TSMs also fit nicely between.
Now the casings are glued on these substructures and so wrapped.
And to finish the top covers are glued then on the casings.
BTW, at the same time I will still look after the pipes of the SSWS, which are running under the SRB Blast Shields into the SSME hole (green arrows) and into the SRB holes (blue arrows), in order to provide suitable holes for these pipes in the substructures before gluing. 
In this image one can see the different pipes,
Source: NASA
and next time I will show these pipes in some panoramic images in more detail. 