Thx.
I also meant to mention that I measured the wall thickness of the A-frame tubing and it is exactly 1/8" within a thou. or two. That means when the standard Reese forming screw is used, which is 13 tpi, there are less than 2 threads engaged (1 5/8 to be exact) and that's if the threads are cleanly formed when installing the screws. And since the tubing is mild steel, there can't be a lot of holding power and it's no wonder sometimes some have a problem with the standard Reese screws. The flange head nuts I used are 7/16" thick, giving over 5 threads engaged.