Razor2 and remaining spam

[Dr Robert Young]

Currently, about 30% of the "spam" that sneaks through our setup of  
spamassassin 3.0.4 is flagged as RAZOR2_CHECKED, but still scores  
below 5.0 ( it varies from 2-4) . We have the rules_du_jour  script  
running updates regularly, and bayes is trained.

Does it make sense to "bump up" the RAZOR2_CHECKED score to 5-7 to  
get this portion of spam, yet allow those emails with enough "non- 
spam" characteristics that might still be flagged as RAZOR2_CHECKED  
to trim the score down to hopefully <5 if the email is actually "not"  
spam?

Currently, the avg spam score is around 16, and the avg non-spam  
score is around -3.5.