If you have access to the scales, you owe it to yourself to set your coilovers based on the weights. It's easy. And you can't break anything. And if you remember to put the weight simulating you in the driver's seat there's only one way you can do it wrong and that's by forgetting to loosen your sway bars. There's really no reason not to try it. There is absolutely no downside and you can take as long as you want while doing it.