Hi Ralph and AP

Desert? Yeah, but WA is not Namibia... :-)
However, that does not address my comment, which was about the map roller
thingy.
I can see the justification for carrying a GPS in the very flat lands, no
worries.
But I have no problems converting GPS coords to a position on a topo map
without any electronic gadgets.

Yeah, sure gadgets are cute - but you have to carry the weight. Me, I am
getting stingy about what I carry.

Cheers
Roger