Photo's 1, 3 & 4 are the nature of the beast. Weld distortion is normal.
John your correct that weld distortion is normal. But what you didn't say is that it is controllable. Clamped down, jig welded and short beads no longer than an inch could have prevented this. One of the post they sent by mistake is missing the gussets on the base to the posts. Guess what, the base is not warped. As a welder I will make my best guess to why that is. The post and the plate are clamped in a jig and then welded. Since the plate and the post are now aligned and welded, the post is removed from the jig the brackets and gussets are welded on later to the plate and the post not in the jig. If you look at a earlier picture in my post there is a picture of the pump bracket that is installed on both sides of the post. There is a level on the post and also on the bracket. You can see that the bracket is not square with the post. That is a dead give away the bracket and the gussets are not jig welded. For a non business hobby welder that's probable OK, I guess. For a worldwide multi billion dollar business that has millions of customers and a reputation to protect that is totally unacceptably. I would never let a a project like that leave my shop in that condition for three reasons. A paying customer deserves my best work. I take pride in my work, and word travels fast. That's just my opinion and everyone knows what opinions are like.
Thanks Gary
img1498 shows the plate is warped from the welding process
img1495 shows the base setting on a level surface at zero degrees
img1493 shows the post leaning two degrees from plum because of the warped plate
img1475 shows a thickness of three pennies can fit under the raised portion of the plate caused by the warp-age from welding
img1481 shows the warp-age in inches
img1499 shows the post from a distance with that two degree from plum caused from the warped plate
img1469 shows the twist/warp-age in the post before its installed caused by the bracket for the pump being welded on