Finally I got it ... thanks to the FAQ (sorry for late reading).
357/400 is not bad, but it seems that I'm another victim of the 44/80 grade on Locking section (all last
SCJD posts seems having the same issue).
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General Considerations (maximum = 100): 98
Documentation (maximum = 70): 69
O-O Design (maximum = 30): 26
GUI (maximum = 40): 40
Locking (maximum = 80): 44
Data store (maximum = 40): 40
Network server (maximum = 40): 40