[Excaliber]

Having worked in a few third world countries myself, I fully understand the need for "affordable" and that would be a prime factor for me. Parts that would interchange with commonly existing chairs, would sure come in handy in those kind of places. You know how ingenious desperate folks can get when it comes to working with what you have available. A new high tech chair is great, but how about if those new wheels or axle's could retro fit the more common chairs currently in use out there as well? Perhaps a good repair facility to improve, rebuild, upgrade existing chairs would also be of great benefit in the immediate future?

Speaking of Haiti, I just saw a news blurb about some 6,000 amputee's as a result of the recent earth quake. Housing today, wheel chairs tomorrow.