Influence of different disc aspect ratios on gap size and precession rate. Top: radius where the density drops to 50 percent of its maximum value averaged over several thousand binary orbits. Since results from two different codes are shown, we omit the two other measurements for the gap size presented in previous sections. Bottom: precession period of the disc gap. For e_bin ≈ 0.16 we observed that Pluto simulations can switch between two states, an upper state (red) and a lower state (green). For RH2D simulations we only observed the lower state (blue). This is discussed in more detail in Appendix A.