Welcome aboard! I'm also a bander who is moving to sleeve. I've had one band for 6 years and it's never worked. When I get fills it will be too restricted and when I have fluid taken out, it's open season. :) My band likes bread, pasta, pizza and coke. I kid you not, no problem with the fizzy stuff at all. What it won't tolerate is fresh, raw veggies and salad. You want to see pain? Get me to eat raw carrot! lol Right now, my diet is made up mostly of optifast, as it's pretty much the only way I can prevent my weight going up any further.
As for leaks, they aren't common at all. Yes they do happen, bur from what I'm reading, it's very rare in Aus. Best thing is, talk to the surgeon you plan to go with, get all your fears and concerns out and get re-assurance from them. Follow your own gut instinct. What was your thinking before the band doc tried to scare you off?