A Bluestocking Knits

Well, I'm not going to get over-confident here, but this thing's going at a cracking pace so far!

The two center sections are now exactly the same height as width, so it is decision time — I will obviously have more yarn than what would make four perfect squares, because out of a 226g ball I have used only 56 (!!) to this point, at which in the pattern the stockinette is reversed, the knit side switching to purls and the purl side to knits.

So should I make rectangles instead of squares, and just keep going to the halfway point of the yarn (which I would be able to estimate by the weight of a remaining ball), or start again and make it wider …