There’s risks to both overs and unders, theres risk to any surgery you have its just one you have take. It’s true that unders is the main culprit for double bubble, but there’s a reason for it happening. I.e given unders when you really needed overs, tubular because unders dusnt fill out the tissue that mainly sits under the nipple with tubular, having loose tissue and having crease lowred aswell as unders (but db can still happen if you have crease lowred with overs too but more unlikely) I had it and had a reop, I still have it to a certain degree, seems to appearing worse again now. BUT it can be fixed so please don’t worry xx