We called the pillars cribs. I still use them some times. I start the crib on one end and start splitting. When I get a nice square piece it goes on the crib, odd pieces go in the middle, so my cribs are very square. It’s easy with straight grained Oak and Ash. This year I had a bunch of cinder blocks left over from a project. On the paved court they work great just dry stacked. I like the brackets that slide on a 2X4 also. I’m OCD about my measurements, and I make all of my stacks in half cord rows. If I cut my wood 18” I can set the brackets accordingly, 16”, readjust the brackets. My customers never get shorted.