Calculations for a test set of seven proteins as well as for alanine polypeptides confirm that the consistent inclusion of two-body contributions in MFCC-MBE(2) reduces errors in the total energies by up to one order of magnitude compared to the conventional MFCC scheme. The remaining errors depend on the considered proteins, and tend to increase with their size. While the error in total energies remain rather large with MFCC-MBE(2)