The Judicial Council of California produces forms for pro se petitioners.  The CR-180 and CR-181 forms cover various forms of “clean slate” remedies, including reducing felonies to misdemeanors (17(b)), set asides and dismissals (1203.4), and vacaturs after successful completion of probation (1203.43).  The forms also contain a notation to 18.5 which makes clear that felonies reduced to misdemeanors carry a maximum of 364-day sentence.