When we used AP-B exclusively I had a check and balance system that made me confortable.   But now that we are trying to use AP-C I am not confortable posting GL-O.  especially with the huge number of PO price variances that comes from purchase orders not matching the vendor invoice.   Before I post anything with I now go in and “Fix”the account the differences go to, because I am comfortable with it being neat and pretty the way it was we used AP-B.  I will not post GL_O if there is  the  PO RNI account has not been zeroed out.    
 
Am I overlooking a “check and balance” method?
 
Thanks  
Laura