Hi, I also had a bypass 4 years ago and am starting to put the weight back on. I am no where near to where I was(410lbs), but it is scaring me. I recently heard of a procedure that is called R.O.S.E. I am not sure what it entails surgically, but it sounded like it was just a stitch or two to retighten where the pouch may be stretching. I am waiting to hear from a surgeon in my area, as we have moved and I am no longer near my surgeon. Good Luck!! Sue