I recieved my Quantum wheelchair in 2017 from National Seating And Mobility. I can't walk but i can stand to transfer myself from one place to another. I used the arms of my Quantum to help me stand. Both arms of that chair has fallen off at one time or another and I landed on the floor. National Seating has come out a few times and fixed it but it keeps happening. It happen late one night and I stay alone. I fall and couldn't get up. Im afraid of my Quantum wheelchair. My old wheelchairs never came apart. Has anyone else has or had the problem