A logical next question is how the QED-CASCI methods perform under truncation of the photonic basis, since here we cannot achieve a fully variational solution even with saturation of the photonic subspace. That is, in QED-CASCI just as in CASCI, the CI coefficients in Eq. 7 are variationally optimized, but the orbital basis is not; this is to be contrasted with approaches like CASSCF/MCSCF, which is fully variational in the sense that the CI coefficients and the orbital basis are variationally optimized. We explore this question using three different active spaces: (6,11), (6,9), and (6,6). All active spaces have excluded 2 core electrons and the (6,11) active space excludes the two highest virtual orbitals; i.e., an (8,13) active space is equivalent to FCI for the electronic subspace of this system. We observe that CS-QED-CASCI-1 is nearly origin-independent;