This is the thing you are looking at? Yeah, I would not worry that perfection would get in the way of fun.
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Another thing I learned on a grid is to make the diagonal in the middle of the side on the square instead of corner to corner. This creates one square that is about 80% and another next to it about 20%. It is better for moving minis and knowing if they can be in a square or not. More like the 2nd in the image below. I have never tried the 3rd, but I like it as well.
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