I use the slik mini with my Swaro 15x56's and it works well. One thing to be aware is that you can tighten up the screws/nuts on the legs before you head out and it will be much more stable of course that is not necessary when it is new only after you have had it for awhile. I also have a big bogen w/ a pistol grip but it stays with the truck, heeaavvvvyy...
I would not use the mini for my Swaro 80HD spotter it is just not quite stable enough. As Len mentioned the issue is that the lens is much further from the center of the tripod whereas the bino's center much better w/ the swaro attachment.
I am looking at the CF tripods as well. Looks like Slik, Vangaurd, Sunpak, and Benro all have less expensive models around 2.5 lbs but it is hard to find a place to actually get your hands on one. I am also looking at the Bog Pod system as it is light and offers some good options but my guess is it won't be stable enough for the spotter.
My dilemma is I want to carry everything I own and I will need to find a much better tripod to make use of the big spotter. I have a buddy that carries the big binos, a spotter, and a small pair of binos he wears and I used to make fun of him. Now I am trying to figure out how to carry all that and a +10lb rifle.