Pretty sure getting IT Band released (at least if your goal is 8cm) is almost enforced by every top US doctors nowadays. Cons it adds an extra scar on your lower leg but thats about it?
It grows back, apparently it grows back so quickly sometimes the dcotors have to re-release it (rarely happens). but IT bands gets TIGHT and it's more stubborn to getting stretched than the quads qnd hamstring so why not make life easier and get it released. You're already under anyways and it takes the doctors an extra 5 mins each legs.