Watched my friend battle her serger for hours last week trying to hem some silk. The machine kept looping thread everywhere like it was purposely mocking her careful adjustments. She even tried new needles and different tensions, but it just snarled the fabric worse each time. Eventually she unplugged it and said it needed to "think about what it did" on the basement floor. Felt exactly like dealing with a cat that knocks over your water glass just for fun.

Totally get that, I used an AR app on my phone and it was a GAME changer. The preview showed how the color shifted from morning to evening light, which saved me from a similar mistake. Now I always test in the actual space before committing to a gallon.