Case for a GPS Breakout in Sketchup (how to make simple cases for your projects)

Time ago I searched a lot for tutorials or manuals how to make cases for projects. I had a LCD+touch assembly with 3 layers of PCBs and making the case was very hard for me (keeping all the 'virtual' positions of everything of the model) so I gave up that time. After I while I found that making a cuboid representation of your internals really help into making the case! any complex project can be represented by simple shapes and you just make the case on top!
Here is the video for the process o