I do it the Judy Martin way when I can - starch fabric, cut along length of fabric, cut logs to correct length. If I'm working from scraps, I don't always cut along the length of fabric and don't always starch, but I ALWAYS cut the logs to the correct length before sewing them. I find this is faster in the long run because I don't have to stop and trim every log after it is sewn. (Think about it - you will have to cut it to the correct length at some point, so why not at the beginning?) If your logs are cut at the correct length you will not wind up with wonky blocks, which is the big advantage of doing it that way.