We justify this approximation by noting that our simulations were used solely to obtain an equilibrium distribution of bottlebrush conformations, with which we calculated equilibrium quantities. Static properties such as bottlebrush extension and radius of gyration were calculated based on equilibrium averages not affected by ignoring HI, and dynamic properties such as hydrodynamic radius R h and intrinsic viscosity [η] reinject hydrodynamics in the context of Kirkwood theory, which can be evaluated based solely on equilibrium configurations.