Assembled base. It became aparent that I've made heights across the base too tall at 100mm not allowing for the 26mm increase. I will have to route off the difference at the bottom of the base before adding baton and acrylic top levels.

Looking at the heights when comparing drawings resulted in varied outcomes. As there as several different levels, in particular around the new extensions I have simplified them. Specific ramps around the doorways will be added as filler parts once the main heights have been fixed.