I live on the big island of Hawaii and need to have a wheelchair shipped from the mainland. There are no vendors here for quality chairs and only two clinics that can kind of do measurments for a manual chair. My question is, has anyone been successful ordering their chair over the Internet and doing your own measurements? I noticed that most sites have a measuring chart to help. ill be getting something that is rigid and somewhat adjustable like an Aero Z. This will be my first chair.