In Table the efficiencies for different sampling schemes are listed for both stacks of benzene. As expected from the discussion in Section 3 and 4 we see that uniform selection of the first particle and subsequent fully-weighted sampling, i.e. unif:full unif-full:full-full, Contrary to the H 30 chain the fully-weighted hole-selection is still more efficient than the fast-weighted one, since there are other effects, that lower the aforementioned correlation between PCHB weights and occupation. There are both single and double excitations and there can be double excitations of the type IJ ← AR. Hence it is more probable that excitations happen to I or J that do not empty A and B simultaneously.