Originally Posted by sewTinker
could be using different rulers on same project? That has messed me up before.
Always use the same brand of rulers on the same project. I learned this the hard way. I mainly use Omnigrid rulers, but also have an off brand and was using them on the same project, the Omnigrid was accurate; the other was 1/16" off. Never again! I can't recall the brand of the other ruler, I don't have it anymore.