Bearisgrey...I find it interesting that you stitch all the lines in the same direction. I was thinking of this just yesterday, as I was doing STID on a quilt. If you turn it around and go the other direction on the next seam, it could really start to look wonky...the blocks could have a slanted, lopsided look to them. I'm working from the center out all going the same direction and that's working well for me.
As for the subject walking feet, (which deserves its own thread, I'm sure,) I have gone through several WF. The modern, plasticky ones just fall apart and don't always fit my machine perfectly, even though they claim that they are for Singers. The one that I have now, moves the needle bar over slightly, so that the needle is off center, when the WF is attached and tightened down. I hate that! I'd love to find an older WF for my vintage Singers. (No, it doesn't have to be a Penguin, but that would sure be nice, now wouldn't it?)
~ Cindy