I'm with Tartan. And today I am glad that I do it this way. I am making My Carolina Home's Scrap Dance Tango. I planned on making it double/queen sized. But today I decided to stop at a large throw size. So instead of making another 70 or so blocks, I only need to make 10. I have enough HST's already made to do about that many.
If I had cut everything out, I would feel obligated to make the original size.