Quote:
Originally Posted by Aliantha
Yes we've employed the measure twice, cut once theory, but ...
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You're missing the last part of the saying, which is don't measure at all unless you have to. It's much more accurate to take your board and hold it up where you want it, and make the mark where you need to cut it. When you get a measuring tape involved, you add a couple more opportunities to let error creep in. The reading the measurement, the remembering/writing down the measurement correctly, and the transferring the measurement to the work piece are all prone to error.
But that little nit picking rant aside, you should also remember that when you build something, you see the flaws much more readily than anyone else will. I still notice the spots where the grout lines are a little out of alinement in the shower I tiled. Nobody else knew about them until I pointed them out.