Gwen at Sportaid was excellent with helping me build my chair over the phone and email ! I’ve been a wheelchair user for 33 years and knew what I needed for the most part but little changes make a big difference. Gwen was patient and organized every time I emailed her , AGAIN, to say “let’s try it this way”. She is very knowledgeable about all the various measurements and components. I ended up with a beautiful piece of equipment.