Hi,
I used soupy cement in the 1 1/2" PVC posts I used. Don's posts look like
they are 3" or 4" and probably would not need the cement. I used small donuts
of concrete that were poured using a piece of 4" PVC about 2" in depth as a
"form." The hole in the donut was made by using a well greased piece of dowel
rod that was later taken out of the concrete donut after it set up. A piece
of 3/8" rebar was pounded into the stuff they call soil here, actually lime
rock dug out of the drainage canals that turned this swamp land into building
lots.
To make slight (as much as 2") adjustments, I made a collar of aluminum
tubing that fit over the end of the PVC. The aluminum tube had a hole drilled
in it that would slip a stainless steel sheet metal screw, a #10 about 1"
long. Use a builders level, water hose level, or laser, then insert the screw
so it penetrates the PVC and you are done. Future adjustments are easily made
by removing the screw, re-leveling, and then inserting the screw again.
The frames were painted with Coronado Mack Green paint as were the PVC
pipes.
Keep your steam up!
Walt