Originally Posted by nickylsf

If each piece is 1/16" off, which they will be if the test block is not exactlly 1", it will make a huge difference by the time all the pieces are assembled. Experiment with the scaling on your printer or photocopier until it prints correctly. For example, if it is 1/16" too large, then try printing at 98% for example, until you find the magic number. I hope this helps!