Possible to Switch from High Profile to Moderate or Moderate Plus?

I am a thin, petite woman with very little soft tissue coverage. I recently had BA with 350cc Mentor high profile silicone implants placed under the muscle. My surgeon used this type of implant in order to adequately fill my breast (after breast feeding 2 kids and having stretched skin and involution, nipple ptosis) He was concerned about rippling and wanted to give adequate structure to support my nipples. In general, I like my breasts; however, I wish they looked a little more natural. What is your advice? Is it possible to switch to moderate or moderate plus later?