With all of this hardware, make sure it is stove bolted into your scenery, not screwed. Putting drywall screws in shear... not the best thing ever.
1x3? is that centimeters? millimeters? meters? hectares? You couldn't be... No... Logos... Wait that's not Metric at all!! Are you taking medicine from that scary old woman "kept for breading" again?
Did you hear that people?****, I have been sprung.
Given my age I tend of course to think in both metric and Imperial as I grew up with Imperial and 1 x 3 is easier to say than 19 x 75. I just went with the flow.