Another item of interest - if there is the slot cut in the gap towards the front - it actually lines up with the needle hole.
If you notice, the one second in from the left, that cut is not centered in the gap. That's not a mfg error, it's because the needle hole is offset from center. Also, having more metal on one side of the gap or the other does not appear to be of importance. I've seen a lot of variations with that - sometimes in the same set. It's how the gap and needle hole line up that matters.
Ok - of these four -which one fits the White? I have the needle holes lined up for the picture.
I'd have to dig through my notes to see what that fits - I'm pulling these pictures off my photo-bucket album and some I took a long time ago
