A little adjustment to the character creation rules:
It is allowed to have the same values on different characteristics twice, as long as the said value is not divide-able through 5 (25, 30, 35, 40). It still is not possible to have the same value more than 2 times.
So 2 times 31 would be ok, 3 times 31 would be not ok. 2 times 30 would also not be ok.