Beky, I'm glad to hear your chair is working out so well and that you are able to transport it. That's really important.
Barry, the chair you linked to really looks amazing and has overcome some of the problems I've seen in other all-terrain chairs. If I did the math right, its 710 mm width will be accommodated by the ramp of a wheelchair van too. Let us know if you find out if it is available in N. America please.