I know you have heard these words spoken at least once: "Do as I say, not as I do." Well, I don't know if the overshot purists are not reading my blog, or are just shaking their heads in wonder.... but yes, I know that this last part that I am weaving 'as drawn in' isn't square. So maybe I am weaving it just 'by the block'.
In a perfect world, I would need to have woven more shots per row to get this table to be square. It's only 2 inches high and should have been 3 and 1/2 inches high. So, if you want to do overshot in it's purest form, you will want to square your blocks, and that in turn should square your design.