So I borrowed the idea of the 4x4 and threaded rod and took it a little further. .... hope you like!!
I wanted to be able to tighten them down without any tools and came up with a t lock nut to help. I used the following to make 1 chock starting from bottom to top
24"x3/8 threaded rod
4x4 8"long on the short side of 30°angle 1/2 hole drilled thru
3/8 lock washer
4x4 8"long on short side of 30°angle drill 3/8 hole thru then 1/2 hole 3" thru from bottom
3/8 t lock nut
Top 3" of rod bent over