I have breast implants over the muscle, 600 cc (38DD/DDD) saleen, 13 years. Slight capsular contracture on left breast. Sagger and larger left breast. Ive had 2 kids with weight gain/loss.I want a tummy tuck with breast revision with exchange of implants to Silicone, smaller size about 350cc ( small C) and a lift. I am confused what to do. Stay over the muscle or change under. 4 docs recommend under (more work) and the one I liked said stay over, because I've had for long time and they won't stay under. What's less risky?