Juan:
You keep commenting on the flexure of the PCB and relate it to the module hardware that you have in hand. It is my very greatly considered opinion that the baseplate that you have has been modified (butchered) to allow for the soldering of the CAN 40pin connector and this has created not only reduced sections in this plate, but probably has also distorted the plate considerable. Such distortions in all likelihood have created a non-normal flexure condition in that particular plate. As such, your opinion of the design has been biased, and that is unfortunate. It seems to me that you should try to acquire an E05 21 base plate that is in "stock" condition. I don't have any in hand here in Florida, or I would have sent it to you some time ago. These parts, unfortunately are in a limited supply at this time.
'73,
Dick Jansson, KD1K