here's a swing arm i made to get my trailblazer in and out of my truck.
3" sch. 40 sleeve 30" in ground
2 1/2" sch. 40 stantion
2X2 square tubing 1/8" 5' long
2X 3/8 plate spines for stiffness.

I wanted to make it light enough to lift it out when not in use. In hindsight, I should've used 3" for stantion, 1/4" 2X2 tubing for arm. Before I welded spines I had about 6" of deflection. With spines it's only 1".
P7230097 (Small).JPG