I personally have not had it done but my best friend had it done.
The same doc that is doing my surgery did hers . I will be honest with you he is very very strict about it and sometimes he wont even do it.
You have to have a very good reason why you want the lapband after gastric., and you have to show that you did lose weight on the gastric.
He agreed to do hers becasue she did lose 124 pounds the first yr with the gastric, but she got preg, and well once you stretch the stomach back out the gastric is about useless that is what her previous doc told her and from what others have told me.
She gained about 74 pounds back alot of it has to do after she had the baby she was just like the rest of everybody else normal stomach and so forth.
I think it would depend on your surgeon there are some out there that wont do it at all, but then there are some like mine that will do it but you best have a very darn good reason as to why you want it done.
My friend had it done last yr and sadly to say she only has lost 40 pounds and that is with 13 pound pre op diet she lost. But, she just dont follow the rules either and has not had a fill since the second month of surgery .