In case this helps anyone...
When @chrispheloung says "rubber mat that is glued to the aluminium case", he's really referring just to the mat and not the entire base of the unit.
I spent 10 minutes trying to pry off the base of the device, damaging its enclosing and eventually breaking one of the screw attachment, before figuring out that the screws were just under the mat itself!!
I decided to take pictures of all the steps of my repair if it can help anyone even more in the future, my Guide is here:
[guide|161990]