There are elements, such as boron, which are common in organic chemistry, but have not been included in general force field parameterization. We could imagine fitting bespoke parameters for a variety of molecules containing these elements. ForceBalance is already available to automatically fit parameters based on reference quantum mechanical or experimental data . Fragments could then be clustered by parameters that are within some threshold of each other. ChemPer's SMIRKSifier can be used to generate the SMIRKS for those clusters providing complete parameters and chemical perception to add to a SMIRNOFF.