A couple of days ago I found a pretty thorough review of some RRS products and the TFA-01 was covered.
The author put forth the the idea that a Frisbee could be used like a saucer under the TFA-01's three legs, and this would give a wider surface area for ground-based shots in soft surfaces like sand (and I'll add, snow).
This was helpful because I was looking at a $100 Naturescapes SKM-II Skimmer Ground Pod II, and improvising with a Frisbee for the very minimal times I would shoot this way, would better suit my budget.
I am not sure what the Forum's policy on posting links is so I would suggest that if you search for
"Shutter Muse Really Right Stuff Ultimate Ballhead and Gimbal Showdown"
you could see the author's views on this tripod, and his"RRS Frisbeepod" idea.
