Picked up a 60 degree ruler today and discovered that not all 60 degree rulers are the same. - some of the angles differed by up to 1/8 inch if you lay one on top of the other. Go figure. Does this matter? I figured it wouldn't matter as I'll use the same ruler for all the cuts. But I thought it was strange. Anyone else see this? There were 3 different rulers by three different manufacturers. I got the Fons and Porter one. Thought it would be the safest to use for size accuracy.