I'll be traveling with my 70 year old mother. If rented a scooter for her due to knee replacement surgery and most recent back surgery. She has also had fibromyalgia for about three years which she takes medication for but does not always work. Her major complaint is both arms and shoulders which leaves her not being able to raise them up too far so not sure if the scooters have adjustable hand grips. What I need to ask is whould she be able to have a gac or not. We never got one for her when she had her two surgerys but with her fibromyalgia not even sure if the scooter is going to be a problem.