Dependence of Ė_ave on the choice of layer depth for models computed with e = 0.1, 0.3 and e = 0.8, and corresponding orbital periods as listed in the label. The average density for each layer depth used for the Ė_ave calculation were obtained from the stellar structure model of a 5 Mo, 3.15 Ro star (Brott 2010, private communication). This shows that for a fixed set of binary parameters, the energy dissipation rates depend on the choice of layer depth only within a factor of  ~2.