The cross-linking behavior for a series of solutions of closely related diskotic side-chain polymers, differing in the tails of the mesogens, has been studied. Solubility parameters are used to describe the driving force for the cross-linking behavior in these solutions. Complex formation enthalpies of the physical networks as determined by dynamic rheological measurements in combination with a statistical network model are relatively low. Moreover, with a statistical theory for equilibrium polymers, used by Cates and Candau for slightly similar systems, an average number of disks in a cross-link is calculated. Only two disks appear to be incorporated in the majority of cross-links, whereas most of the disks are in a free state.