I'm Lee Sykes I have rheumatoid arthritis and I have since I was a baby I had to have my hips and knees replaced at age 12 then I had my hips done again 10 years later then I had to have my right knee replaced again and it is worse now than it was before I had it done so I use a wheelchair to get about but unfortunately because I have very limited upper body strength I can't push myself up hills so I don't get out much that is why I would like a firefly attachment for my wheelchair so I can get out more.