I know there's been trial after trial out there if you can find them.. but I wish someone here (a REAL person and not a paper plot report from a seed company or an equipment manufacturer!) Would plant 10 acres or so at 4.5 or so and another 10 in the same field, side by side at say 8 or so. Sorta like what was talked about ahead of the rain or during the rain below, just a little more planned. I'd actually like to see if with a a couple different planter types actually, hi speed and non-hi speed for one, regardless of the upgrades to either. I have never been a big believer in seed spacing is key.. I think if you're picking one key component, it's even emergence. I think doubles hurt bad, and skips maybe a little less... I think one zero yet the two on either side of it might possible pick up a little or even if not, is better than two getting dinged from being attached at the hip and pulling down on the 3rd one right after them. It's my belief that you could plant at very high speeds and have "worse than perfect" seed spacing but have even emergence across the stand if everything wasn't bouncing across rough ground and have better yields than if every stalk looked like it was planted with perfect spacing but the emergence isn't even. That could be variance in row unit depth because of planter settings, bouncing, poor seed-soil contact in spots etc, don't really care the reason. Just my thoughts over the years coming from a person who only ever planted with cyclos with basic upgrades and many times planted with nothing more than a ditch between mine and much nicer equipped planters and have outyielded those on more than one occasion (as they have me, which there are way more factors involved than just that, but still could play into it.)