Clinical Mastery Series 3 and 4 are now out for each subject

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So I noticed that the nbme website now added Clinical mastery series 3 and 4 for each of the subjects(IM,Surgery,Peds,OBGYN,Psych,Neuro). The only CMS they took out was psych form 2. If anyone has experience with these exams, is it worth doing them if I've already completed forms 1 and 2 for each subject?