It seems I have a well behaved Sabre, because it has not spanked me (yet) during about 50 jumps. I do nothing special to slow down the openings while packing. Its a second hand rig and I think the slider may have been changed for a bigger one (I do not know how big the original slider is). The lineset change comment made me wonder, however, if it is likely that after a competent rigger does a proper reline job with the canopy, it may start opening harder. Could it be that openings are ok because the lines may be slightly out of trim? hki