Update to 2019 Geometry Description

[pbutti]

Modify the 2019 Geometry Descriptions to get closer to the design geometry.
A documentation of the location of the sensors according to the design has been done by Tim and documented here:
https://docs.google.com/spreadsheets/d/1JY-HPvvph52U6hoqUNhvhRNZR997UAq1YfdVHRoDEHU/edit#gid=0