I would avoid revision of obesity surgery unless there is an otherwise unremediable problem. This man should be told to chew his food throughly (20 times per mouthful is a good guide early post-op on the transition to solid food - "use your teeth like a vitamiser") and that this will most likely solve his problem.
If there is a need to do something more active, then (assuming you've assessed the stoma and proximal pouch with a limited dilute barium meal) endoscope him, and dilate with oesophageal bougies, gently. The previous surgery may have included a prolene suture to keep the stoma from dilating.
These patients are really manipulative, and a danger to themselves. I gave up doing bypass surgery three years ago, after 110 cases in 12 years, even though it was a great pleasure to find a slim attractive young woman in the waiting room that you didn't recognise six months down the line. While 3/4 patients did well, there was a handful who were a real pain and had hidden their peersonality or psychiatric problems very successfully.
This guy is likely to welcome the chance to overeat again after a reversal and then come back demanding another gastroplasty.
I expect with the new Angelchick-type inflatable-adjustable gastric bands that some patients will manipulate the device themselfes by deflating the reservoir. We had patients with jaw wiring who would vitamize a hamburger.