I am planning to have a Gastric sleeve in about 6 months but afterwards I will have saggy extra skin on my arms, thighs and my abdomen after I lose a significant amount of weight. What’s the next step to tighten (or get rid of) that extra flabby skin?? Current weight 238, hope to be about 180 by 6 month post op appt which my Bariatric surgeon says is a reasonable goal. He thinks I will lose some weight prior to surgery as well. Your thoughts?