This wheelchair has been made & tested. It will benefit from a variable ratio gearbox to cope with incines. I have designed such a gearbox but is there something already in use that I can utilise. This product is the best I have seen with many advantages over existing models. Is there anybody who wants to help with the development?-- liam2, Jun 04 2004 From the idea text: "This wheelchair has been made & tested."From the Help page: "Ideas for the halfbakery should be original to the poster and should, as far as the poster knows, not exist already...Do not post product announcements or advertisements."It may well be a good idea, but I'm not sure that it belongs here.-- angel, Jun 04 2004 random, halfbakery