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One board used 56ohm resistors - as was recommended in the calculator, the other used a slightly higher value, because I didn't have enough of them. I was going to run without resistors at all, but bottled out, and retro-fitted them to my first panel. Yes, one of the panels _is_ brighter than the other, but only very slightly, and I don't think it'll be very noticable. This is taken with a short exposure and fill-in flash, to give an idea of the layout. It fairly dazzles in real life.