Filament (left) and prominence (H-α) visualisations (right) of the 3G (top) and 10G (bottom) cases using the method outlined in Heinzel et al. (2015). Right: evolution in the flux rope O-point and prominence mass are overplotted on the prominence evolution as the solid black and blue lines respectively. The large jump in altitude experienced by the 10G case is caused by the injection of the larger of two subordinate ropes into the main forming rope (cf. Fig. 8).