I'd only make a few suggestions to that thread.
1) making every piece a 2x4 is unnecessary. You'd be able to put a car on top of that stand (built properly). I made mine completely from 1x3s and its very sturdy and has been holding the weight of a 40b for around 1.5 years. If building again, i'd probably go 1x4s for the upper support section. Also, the stand will be quite heavy if you make it out of 2x4s. Thats usually not a huge issue if you're not planning on moving it much, but it may be a consideration. Someone did the math on that stand and it can hold something like 4500 lbs extremely safely. I've haven't checked the math but it seems in the ballpark.
2) at the base, I would stagger the joints or seams of the 'uprights' and the 'bottom rails'/'bottom ends'. That way if there is an imbalance of weight due to not even flooring or not perfectly built you'll be able to avoid having a shear force on the seams, which are the weakest part of the stand. You'll also be more likely to notice gaps during construction and make appropriate fixes.