Two things Ive learned recently

How to make two pieces of metal exactly the same length. These two chainstays are exactly the same length. I have good eyesight. I have been filing these and checking their length in my frame jig for two hours, and they are so close in length i literally would have to use a magnifying glass to see any difference.The second thing Ive learned is that my bike frame jig is completely square, and i thought it wasnt. Go team.