Many of the new light-weight travel BCs do not have a rigid plate but instead just use padding under the tank. My wife is looking for a bc but she is petite and we are concerned the tank will press too hard on her backbone. One comment made at an LDS was that most of the time will be in the water and not walking around so it won't be a problem. It think I remember seeing one that used a heavier neoprene pad but most seem to crush easily. Has anyone noticed this to be an issue?