I have used aTreelounge treestand for about 15 years. I made my own after seeing the stand in a video. I used Aluminium from old balcony railings and cored it with wood to minimize noise. The absolute most comfy stand I have ever hunted out of, I can stay in it all day long, no problem.
It depends on what type of hunting you do and how far you have to pack it in.
I don't think there's one climber that perfect for all situations. I have a summit and it's very comfortable, but not great for bowhunting and I have a lone wolf that's light and great for bowhunting, but not real comfortable.
What does "gauge" mean anyway? As used here gauge means the number of round lead balls the same diameter as the inside of the barrel (aka the bore) that it would take to weigh one pound. It takes 12 lead balls the same diameter as a 12 gauge barrel to weigh a pound. The smaller 20 gauge would require 20 balls of that barrel diameter. The larger bore 12 gauge would require 12 lead balls of the bore diameter to weigh one pound.
In general the number of pellets in a shotgun shell...