To get around this, I am planning on loading up my knitleader with a blank mylar, and setting it up to the correct gauge as given in the pattern, and air-knitting the sweater, whilst putting dots on the mylar. That way, I can draw up an accurate schematic that I can use with the yarn and tension I've chosen.
I'll let you know how it works out.
In other news, congratulations to Ravelry on now having more than 2 million members. Interesting that it happened on the leap day.