Having established that two-body energy screening is a viable means to construct binding-site models, we next consider the application of MBE(n) to models constructed in other ways, either using a simple distance criterion or else by means of the rinrus code (as described in Section 2 .3). Table lists errors in MBE(2) and MBE(3) values of ∆E int for various models, with all calculations performed at the HF-3c level.