Calculations were performed to calculated absolute, net, and excess uptakes for each of the MSUCOFs. In the main manuscript, the absolute and net volumetric uptakes are shown as well as the absolute gravimetric plot. For completeness sake, the remaining excess volumetric, excess gravimetric, and net gravimetric plots are included below. Notably, the top performing MSUCOFs maintain exceptional net gravimetric uptakes of approximately 3% even at 700 bar. The optimal gavimetric pressures, as defined by maxima on the net gravimetric plots, tend to occur between 100-250 bar for the most exceptional COFs. This is in line with the results from the net volumetric uptake charts.