Ok, since the two are pretty busy "hitting" the road - let me provide a little update:
they made it thru Mexico and are now in the Santa Barbara area.
They highly appreciate all the assistance and advice that was given to them until now.
So, once again, if you have not done so yet but are ready and available to help fellow-bikers, please contact them at:
unterwegs(at)welt-tour.com
GPS data will always be helpful