Yeah, it's tricky sometimes with Chelsea because she has to get drains. At some point I wish she'd just let them go completely just to see if 30K is humanly possible. I used to think 5,000 was impossible back in the wendy whopper days so with Beshine hitting 10K and Chelsea 15K, I'm not really sure there is a limit at all.
I am curious about those limits as well. A friend and I like to discuss the constrains at larger implant sizes and I have given some serious thought on that topic lately. Of course we're talking about really big sizes, so big that the girl wouldn't be able to wrap her arms around her breasts, so big that maybe we would never see them, but still i like to imagine the possibilities. How would she use a PC?: uncomfortably sideways? I don't think so. More feasibly PCs would be out of question for her. IMO She would be be 'restricted' to a laptop (on top of her boobs?), a tablet pc or a cellphone with internet. How would she eat?: she wouldn't be able to eat at the table, I think she would use bowls that can be carried in one hand and brought near her face, just like people eat in Eastern Asia. How about particular cars? A friend told me that steering wheels are out of question, so, maybe steering pedals like in tanks? lol. In any case if someone got that big she would need lots of help from people around her, and I am up to be hired if that was necessary, lol.
Also, usually I have thought that 'any' size is possible given enough time and that the main constrain for a model's size is her own attitude. Maybe I am too optimistic, but I think that we haven't seen anyone near the maximum anatomical/physical limit for big breasts, yet (I could be wrong, the anterior are just personal opinions with no scientific backing).