Another modification that I would suggest for those tents is to reinforce the top poles. Most of them come with 5/8" hollow stainless steel poles for the top braces, but by the time you're done hanging lights and fans and filters and Christmas ornaments or whatever, those poles are flexing pretty badly. I wouldn't trust $5000 worth of White Rhino under all that hanging stuff when the poles are that flimsy. I found that you can get half-inch diameter steel rods from Lowes or Home Depot, precut in various lengths, and just slide them inside the hollow tube. Yeah, it adds more weight for the vertical poles to support, but they can handle it - they have plenty of compressive strength; just suck at flexural stress. I brace the two interior poles that are used to hang hardware, plus the two side poles from which those other two poles are suspended. The two side poles that don't bear any weight, I just leave alone. All they need to do is provide stability to the frame, and they're plenty strong enough for that.
I also don't trust the plastic corner brackets, or the plastic end pieces on the interior poles - the ones that are supposed to attach the interior poles to the side poles. So I use copper plumbing fittings on the top corners (bottom corners don't matter, because they're not bearing any weight) and use eye hooks inserted into the hollow ends of the interior poles to hang them from the side poles. By the time I'm done bracing that top frame, I could use it to pull the engine out of my car.