Too much removed from sides of legs from lipo 6 years ago. Is fat grafting only answer? I don't want more lipo. (Photos)

It appears from your photos that fat grafting is your best option. There is really no other permanent solution. Experience, attention to detail and artistry of the surgeon  is what gets the best results not what gadget is used.

You have a difficult problem.
Correcting excess of liposuction it's difficult and at times not possible.
The primary reason fat grafting is limited in your case is the lack of tissue to graft fat into.
The amount of tissue left after your excessive liposuction is thin.
Putting in high volumes of fat into limited areas leads to higher rates of fat necrosis with poor volume retention.
The mid hip or upper outer thigh area is sometimes referred to as a hip dip.
Some people have this naturally and it can be caused by poorly performing liposuction of the outer thigh.
To avoid this during surgery patients should be on their side ideally with a foam wedge putting the legs apart.
This maneuver it simple when patients are awake.
When General Anastasia is used on outer thigh liposuction it becomes technically much more difficult.
Please don't have high expectations for correcting this with fat transfer.
My practice is devoted exclusively to liposuction and fat transfer procedures.
I perform a minimum of 400 of these procedures per year.
I'm sorry to have such a bleak outlook but I say it like I see it.
Best,
Mats Hagstrom M.D.