Hey Rob. Your comment "you don't see many tents with the 3000mm water proofing on the floor these days" has proven to be quite relevant to the tent I acquired.
If you view the following January 2012 YouTube, at around the 20 second mark you'll hear the fellow say "We use really lightweight rainfly and floor fabric to help bring down those overall backpacking weights down." As he's saying that, look at the tents' floor material colour. It's orange like the rest of the tent. That's what I've got on my tent .. lightweight orange floor material. No way that's 3000mm gauge. .. http://youtu.be/ly2-QR42oUg
I'm familiar with the 3000mm gauge floor material Marmot uses as I have it in my oversized Marmot campground tent. Its grey, rubbery and noticeably thick .. as in shown in the 2013 Marmot website description of the Astral 3 as its being produced now. The grey material is also visible in this April 2013 YouTube video http://youtu.be/DkYqT4O4iFo
So, it looks to me like they originally (2012) produced it with lightweight flooring and subsequently (2013) changed its specs to a floor with 3000mm waterproofing, no doubt bringing up the tent's weight!
All this leads me to ask you all, what measures (if any) do you take to augment your tent's floor .. outside "footprint", inside "plastic-sheet-pan", etc?Barry Bridgeford
.. Algonquin Backcountry Recreationalists - Caring for Algonquin's Backcountry
.. Backcountry of Algonquin Park Leave No Trace Outdoor Skills and Ethics