We start with the model using the lowest cost QM dimer correction: the GGA DFT functional PBE. Using the FIT+DMA+PBE model, the ranking (N lower ) either remains the same (for the α form of oxalic acid) or improves for all experimentally observed crystal structures compared to FIT+DMA (Fig. ). We also observe a comparative lowering of ∆E in every case aside from negligible increases in the ∆E for formamide and naphthalene (Fig. ).