All right, thought the issue was the foam but it was not.
Bought two more microgel prestige (now total of 5 racquets) thinking to be able to get out them at least 3 with the same weight or very close.
So far I found two racquets that have the weight pretty close to each other, the remaining three...well they are all over.
How is this possible?
At this point should I think to find a different racquet?
Any of you guys had the same issue?